"Shareaza" is a popular p2p program that supports multiple networks such as the gnutella network.
A few weeks ago, an "imposter" company ("Discordia") took over the Shareaza website and put up their own site, complete with fake software. They call the software "Shareaza v4" and even use the Shareaza logo.
Some fans of the real Shareaza wanted to try to take down the hijacked site - but then someone from the imposter Shareaza site actually threatened legal action against the real Shareaza team because of that.
I just read now that the people behind the fake Shareaza site are now trying to register the "Shareaza" trademark for themselves to prevent others from using it.
This page has links to multiple news sites reporting on the Shareaza hijacking:
http://www.shareazasecurity.be/forum/viewtopic.php?f=46&t=411
Here is the forum with many more posts regarding the Shareaza takeover:
http://www.shareazasecurity.be/forum/viewforum.php?f=46
Here is the official Shareaza site. The real Shareaza:
http://shareaza.sourceforge.net/