Well, about my Company, it is legal. About burning the cd on a cd then send it to another guy, taking payed for shipment, and Time used to download (this can be, if not legal by licens, be hided under \"rent of Hardware\" or \"rent of human service\".
You can Sell an opensource program which is licensed under The GNU, but, if you do, you must give the customer the same rights. (easy explaining. read It yourself. I will look up the Gnu licens soon, but got no time now)
Edit: i have read all planeshift licens a cuple of times now. and found out that I was Partly wrong. I wasent complete aware that the Art was Custom licens. This would make the Sending of a cd, partly ilegal. If i Distrobuted the Gnu code though...
Anyway. By leting people Download it trough bittorrent. All who do (expect the devs) would do illegal things. Cause you share it while download it.