Just few days ago I had upgraded my software in my IST DS to 2.01 and today I've seen great news in dSLR world.
"There are approximately 24 million compatible lenses, as march 2006. This figure is a total of all lenses sold by PENTAX since the m42 screw-mount lenses." + all lenses which were produced by other brands and fits Pentax, and all of that works perfect with the new PENTAX K10D which is on my list of must have:D
I was expecting full frame dSLR from pentax but for now k10D will be fine:)
Links to this great camera which should be priced under 1000$ are below:
PENTAX

Dpreview