I've noticed a few versions of LimeWire Pro being shared on LimeWire.
While I have no qualms about it, If LimeWire don't like it surely they'd put a stop to it, I sorta feel it's a bit rude, after all they provide a great service and we're abusing the priviledge by using their own website to share it for free.
Sort of like shooting someone with their own gun.
Maybe using Morpheus or one of the other Peer to Peer sites would be more appropriate.