martinscott wrote:1- Are we restricted to any specific engine, or can we use any Quake1 engine currently available?
Nexuiz uses a fair amount of functions in darkplaces that are extensions to the old Quake1 code. Switching to another engine would very likely break things if it doesn't provide the needed functionality.
martinscott wrote:2- Because our code is to be released under GPL, are we as competitors then also allowed to use/adapt currently available GPL QC code into our submissions (ie. VWEP, Bots, etc...)
Yes, as long as you fully comply with the GPL. This means giving credit where due and always release the work under the GPL license.
martinscott wrote:3- It is my assumption (so please correct me if this is wrong) that we are permitted to use any content resources currently in public domain (textures, models, skins)...True?
Nexuiz' content is all licensed under the GPL, so the same things as above apply. If you're asking whether you can use other public domain content - the answer is unclear.
http://forums.alientrap.local/viewtopic.php?t=5389 is an in-depth discussion on this subject.