I'm thinking about buying a Panasonic GF1 Micro 4/3 camera with a 20mm pancake lens but I am worried that over time it may be an issue that I can't zoom with it. So, could anyone give advice about whether the pancake lens is better? Also: I have loads of old lenses from a Minolta film camera my Dad had - is it possible to use an adaptor with the GF1?

(sorry, I've copied and pasted that from something I've written on other boards but it still stands - I NEEDZ ADVICE PLZ!)