There's been some recent movement in the class action lawsuit. The judge has ruled that members of the class should be notified and ordered seting up a website (www.ProsperClassAction.com) and has suggested the matter could be decided on summary judgement, skipping the need for a trial. Prosper may be thinking about the possibility that it might lose the lawsuit and face liability for damages.
Looks more like someone jumped on the name to make a little money selling it when the time is ripe. Here's the WhoIs info.
Registrar: FastDomain Inc.
Provider Name....: BlueHost.Com
Provider Whois...: whois.bluehost.com
Provider Homepage:
http://www.bluehost.com/Domain Name: PROSPERCLASSACTION.COM
Created on..............: 2012-03-20 11:35:14 GMT
Expires on..............: 2013-03-20 11:35:14 GMT
Last modified on........: 2012-03-20 11:35:15 GMT
Registrant Info: (FAST-12785240)
Bluehost.com
Bluehost Inc
1958 South 950 East
Provo, Utah 84606
United States
Phone: +1.8017659400
Fax..: +1.8017651992
Email: whois@bluehost.com
Last modified: 2012-03-29 18:21:05 GMT