I Google'd Free20 and it looks like they been pretty busy hacking into a diverse group of forums. Fightingarts, Satannet, a Motley Crue fan board, 3D Realms, Sportbikes... etc.
Times were that is a was a couple of pimplely faced geeks that crack a computer just to see if it could be done. Now-a-days it's a profesional hacking in for info to sell or extort.
It's gotten really bad in the last 2 years, and will only get worse. Keep your anti-viruses up to date (run 2 anti-virus programs if you can) have a physical firewall (router) and a software firewall. Run a spyware program, keep an eye on your processes list and know what processes belong to what. Understanding your computer is the best defense.

Edit::: Oh! and since they got into the password lists, Change not only your password on here. But any other web site where you used the same pasword to login.