Solveig writes that the key for users of Grokster et. al. may have been getting files for free, not the beauty of the architecture itself. We'll soon have a test of that principle. While as Solveig notes some P2P software makers seem to be exiting the market following the 9-0 MGM v. Grokster decision, some may be trying to go legit. Slyck News reports that LimeWire is about to launch a system that will block copyrighted files and give the user a notice that no license could be found. This comes mere days after the RIAA reportedly warned P2P providers to protect copyrighted works. LimeWire is a major Gnutella platform user. Will its millions of fans continue to use it if they can't get copyrighted works for free? We'll see, but at least one fan thinks this means the end for LimeWire.