>If you expect your client to pay for development and/or if you are reliant on access to their smarts or personnel to complete the work, they may well ask for ownership of the work they are funding. Fair enough, too- if they help you make it good and pay for it, they did that for themselves, not so you can sell to their competitors and make yourself rich ;-)
Check out http://www.developerdotstar.com/mag/articles/daniels_softwarecopyright.html

Good link! thanks. It's all tricky stuff, I really don't want to deal with this side of things.. but I guess sooner or later.. I gotta