To check it out: 1. go to the public diaries page of any member 2. hover your mouse over where it says "nickname's bio" (located under progress graph) 3. it should popup a window with some of the bio items in it ie. birthdate, member since date, location, occupation, etc.
To change any of your items or to make them private, go to account maintenance and edit your bio. The height and age are taken from your daily diary entry, unless they're left at zero.
As always, let me know if something doesn't appear to be working properly.