I did not sell my film camera and 98% of my gear can be used with my DSLR.
I can't see selling my film camera, there are still times when I feel like shooting film, especially because of the 1.6 crop factor on the 20D...I can still get wider shots on film. It's also a nice back up.
I kept my film camera and I went with a Nikon DSLR with the intent of using the same gear for both bodies. I find that film still does a better job in some areas and I still like to shoot it occasionaly.