You need an adaptor to fit old Olympus film slr lenses to a digital Olympus. And with the adaptor are some limitations, no autofocus and you have to stop down to take the shot. But that said, with the adaptor, any OM fit lens can be fitted to a digital Oly (so yes, with an adaptor your soligor would fit).
If you can cope with the limitations, old Oly lenses give very very good results. And the focal length is doubled. So your old 135mm f2.8 becomes a 270mm 2.8. Which, if you compare that with what you'd pay for digital glass, is a very lo cost way into some very classy results.
More details at http://www.wrotniak.net/photo/oly-e/any-lens.html
I picked up a 50mm f1.8 zuiko for $25 that works fine if I stop it down to f2.8; I then picked up a 200mm f3.5 vivitar ($20 w/shipping) that seems to work pretty well. I do a lot of sports photography (volleyball, basketball) in school gyms that aren't very well lit. The kit lenses are just too slow that I got with my e-500.
Next I'm looking for a 28mm to use; love to get the f2, but my budget is more of the f2.8.