In reply to Celebrating 12 years of Typophile today!:
Some other good threads:
http://typophile.com/battle20 (this is the one I wanted to link to originally)
http://typophile.com/node/65861
http://typophile.com/node/65922
And I think one of things typophiles do best is dissecting minutiae:
http://typophile.com/node/65886
http://typophile.com/node/72769
And critiquing typefaces:
http://typophile.com/node/60316
http://typophile.com/node/72128