co1hz:
1. The fingerprint machines are at the "Application Support Center" on Portland Street (a small office very close the JFK Federal Building, where you go for your EAD, InfoPass etc.). They give you a time slot. Even though my slot was in the afternoon, I showed up right after they opened and was accepted without any questions. Go early, since by 10:30 they were REALLY far behind.
2. No tricky questions. They did not offer the new test. The history/civics questions were very simple (of the "how many stripes" variety).
3. I don't know when the name check starts, so I can't tell you how long it took. The entire process took around 3 months.
A non-scientific poll among my friends shows that the timeframe is around 3 months from the day you mail your application. This is a major improvement over how things were during the summer of 2006.