>to be a little more friendly while still retaining a clean corporate feel.

I think Proxima Nova could go.

Locator

In order of increasing friendliness:

FF Kievit
FF Strada
FF Profile

Maybe Akkurat (lineto) or Avenir next?

Thanks for all the suggestions, I think I’m leaning toward the Proxima sans right now. If you have any more keep ’em coming.

If you like Proxima:
Futura Maxi
Neuzeit Grotesk
FF Schulbuch Nord - grotesque in the Helv flavor, but the tailed ’l’ adds personality

And less Proxima, but still clean and casual:
Freight Sans

To go in Stephens direction somehow:
Typ1451 from www.lineto.com (somebody mentioned Akkurat from lineto...).
Check it out in the lineto typesetter. Typ1451 has a “Kabel-e” Alternate Version.

@Stephen
Didn’t know Futura Maxi, thanks.