Good idea, riccard0!
I am sure there are a lot more of these lists, gathering dust in the Type ID archives. I will add them when I run across one.

External, but nevertheless utterly useful:
FontShop’s FontLists, compiled by Stephen Coles, Yves Peters (and others?)

Bauhaus Faces, by Mike Yanega.
Keywords: geometric, constructed, elementary, modular, simplified, modernism, constructivism

Lined Fonts, by Mike Yanega.
Keywords: inline, outline, biline, triline, multiline, sports, neon, highlight, 70s

Goodbye to the old fogeys!, by Carl Crossgrove
Contemporary book typefaces
Keywords: book design, text workhorse, exhilarant options, 21st century

Reading sans-serifs, by Florian Hardwig
Sans-serif typefaces suitable for longer texts, some even for books
Keywords: humanist, non-grotesque, stressed sans, some-serif, serifless roman

Attack of the Square Sans, started by Chris Keegan
Camingo, Fago, Klavika, Stainless, Soho &c.
Keywords: sans-serif, squarish, rectangular

One size does not fit all, collective (suggested by Alan Robiette)
Typefaces with optical sizes
Keywords: size-specific, Micro, Caption, Small Text, Text, Deck, Subhead, Headline, Banner, Display, Titling, Poster
Related: Optical sizes at Identifont

Rational-irrational, started by Florian Hardwig
Sans-serifs in the spirit of Venus
Keywords: grotesque, quirky, 19th century/early 20th century

Neither Typ1451 nor Gravostyle – what is it?, by Florian Hardwig
Rounded (engineering) sans-serifs
Keywords: DIN, typewriter, gravure

Roundhand roundhoused, collective (suggested by Seb von Bischopink)
List of angular scripts
Related: http://typophile.com/node/15524
Keywords: zig-zag, angled, ribbon, tape

Florian, you picked the two Font ID Guides that I would also have called illustrated lists: Lined Fonts and Bauhaus-style.

I would also suggest that the Serif Font ID Guide has usefulness as a variety of illustrated lists related to Serif fonts: you can show all fonts by a particular designer, from a particular foundry, or with certain structural features, such as crossed W, M's with no top serifs, and g's with open bowls ( to name just a few lists that could be displayed).

- Mike Yanega

Thank you all for the additions! :-)
I’m with Florian about the extemporaneous nature of these lists and that just few would be really wiki material.
(Plus, as Craig notes, they will need to be linked here anyway, because wiki entries aren't really discoverable.)

About FontShop’s FontLists: they’re indeed useful (and decidedly an inspiration for this very thread). There often is a thread which starts from one of these and adds to them, for example:

The Spurless Sans list, collective
Keywords: Ubuntu, Prokyon
http://typophile.com/node/68016

Another less, if ever, used external resource would be MyFont’s Albums (example: http://new.myfonts.com/users/dtk5k4mb2g/albums/207781/). Admittedly, the fact that they’re less curated, make them less useful.
And they share the same shortcoming of FontShop’s lists: being limited to one retailer offerings.

And vice versa.

Indeed, my choice wasn’t casual ;-)
http://typophile.com/node/36138

nice, i like:-)
♥♥♥♥♥♥♥♥

Frode: http://typophile.com/node/81517#comment-461769
But it’s good to have more keywords :-)

Thanks Riccardo. Didn’t see that. Btw: Any list we’d ever come up with is basically just an homage to Florian’s anyway.

Cure for Courier
Contemporary monospaced typefaces
Keywords: monowidth, coding, narrow, humanist?
Related: Most Modern Monospace

Sans-serifs with small cap figures, started by R.
Small cap figures are lining at x-height. This list narrows it down further to fonts with a wide language support (CE, Turkish)
Keywords: small caps, figures, sans-serif, tabular, proportional

Geometric/constructed scripts, by Florian Hardwig:
http://typophile.com/node/68809#comment-403798

Fat western slab-serifs, by Ryuk:
http://typophile.com/node/91080#comment-499575

"Ultra round" (fat and round all around), by Ryuk:
http://typophile.com/node/93829#comment-512790

How about we actually come up with semantically informative names (categories), as opposed to clever band names? Rhetorical question: To a newb, who is this “Steven” guy? That’s not very helpful (the section name, not Steven. He actually introduced me to Mike Parker. Thank you for that. You’re right, Mike tells great stories.).

riccard0 raised a good point, but there is another aspect that people seem to be overlooking.

We can easily make a (Wiki?) section with categories and examples. Just like FontShop’s category section which we can update over time. However, people will still post in the ID section, and end up getting buried list-like responses.

Solution?

A single new board for “What are some fonts similar to this?” requests. This removes them from the ever-burying ID board. Then, on the afore mentioned “Similar” board, more experienced Typophiles can simply point the poster to the correct Wiki section. Problem solved.

And there’s a hidden bonus to this solution: If, in the initial post there is an actual ID request, and, it gets solved (followed by list-like responses, the initial problem statement), then, the ID can be added to the Wiki. Now, the Wiki grows on its own!

Remember, people will always be posts on the wrong boards. There’s nothing we can do to prevent this 100%. This issue can only be addressed through moderation, and moving threads.

See also — Typophile to do:

Letters made of dots, dotted typefaces, made by Ryuk:
http://typophile.com/node/97219#comment-526532

Fonts with diamond-shaped tittles:
http://typophile.com/node/97738

hhp

Interlocked!
http://typophile.com/node/97932#comment-529662
by Ryuk, of course.

Serif Typefaces with upright italics

and always enjoy Stephen Cole's MyFonts Lists