While looking over the recent TDC2 2009 Winners I noticed Expo Serif. After printing the sample .pdf and mulling over how this type family looked on the page, I began to realize how well it reads. This font has to be among the most legible and readable I've come across. I usually don't go in for such softly-curved letterforms (save for Kris Sowersby's Feijoa, which I *love*), but Expo's getting to me.
Any thoughts on Expo Serif? I wonder what my typographic betters think of this, so I can learn as well.