As a late followup to the Linksys WRT54G firmware thread, here's a link on Seattle Wireless that gives an angle on the Sveasoft story that is, I think, more important than the legal GPL angle. It's a story about open source community. It gets interesting near the end of the large third paragraph - search for "Buzbee".
http://www.seattlewireless.net/~mattw/index.cgi/seattlewireless/hacknight/20...
Stuart Williams.