I haven't gone through the whole thread here yet, but from what I've seen there are quite a few people using the old film era lenses to good effect. Hopefully I can do them justice once in a while too. I just got my K1 yesterday, a nearly new one from eBay that hardly looks like it's ever been used, and a shutter count under 10k. I took this after work today with my old M28 f2.8, stopped down to either f8 or f11.
A couple ugly ducklings followed me home from the camera store today too, a pair of F series zooms (35-105 and 70-210) so that I've got something autofocus for family snapshots and just generic walkaround lenses.
Kristian