Grouper.com in it’s infancy was a hotbed of warez swapping and a kazaa alternative to most. It’s cumbersome controls and resource intensive software ruled it out as a choice to hardcore p2p enthusiasts. However, because of it’s user friendliness it seems to have caught on and is now changing it’s ways.
Sony announced they have purchased Grouper.com and intend to market legal videos via this p2p video portal ring, thingy. Check it out for yourself at Grouper.com.