I have had my K100D since November, and I love it. I am new to DSLR as I have always shot on film with a Contax SLR. I have had the K100D outside in rather cold temps and not a problem, spent a day at the zoo and snapped over 100 shots. To me the K100 is an excellent choice that I am sure you will not regret.
Some of the pictures from my K100D can be seen on
http://www.flickr.com/photos/manager_2000