Just to add to the link list, Ed Foster's GripeLog at http://www.gripe2ed.com
is a terrific resource for problems with software and hardware vendors. Ed's been doing this for years (first with InfoWorld magazine, then on his own, and now back with InfoWorld again.)
What's better is that Ed is actually an advocate
for his readers, often getting involved and talking directly to the companies on the receiving end of a gripe. (You may find it hard to believe, but some companies will actually respond more snappily to a reporter from a nationally syndicated magazine than they will to one of their own paying customers! Shocking but true!!
Ed also fights the good fight for all software users by blowing the whistle on shady licensing schemes and marshalling opposition to bad laws like the UCITA amendments "big software" tried to enact into law without anyone noticing. He also maintains a list of the most griped-about companies.
A great read, even if you don't have a rant. People should be required to spend an hour at his site before they're issued a software buyer's license.