It’ll be nice to be able to put the lenses from my K1000 back into action.  In particular, I have a 35-200mm zoom that should be useful at airshows and such as a 56-320mm (effective) lens.  I also have a couple of prime lenses kicking around: a 24mm f/2.8 and a 50mm f/2.

Amazon.com : Pentax PK Lens to Canon EOS EF Mount Adapter : Camera Lens Adapters : Camera & Photo.