Well, it was bound to happen sooner or later. According to dbtechno.com, Sony Computer Entertainment America has announced they will start shutting down servers for a bunch of PS2 and PSP games. They officially go offline on June 30.
Obviously, they're only making way for more PlayStation Network stuff on the PS3, and we can't imagine that many people are still playing these PS2/PSP games online, anyway. However, we're sure there are a few, and if you're one of them, you'll likely be disappointed. It's an inevitable part of the ever-expanding and forward-minded business model, though, so don't feel too badly. Besides, look at all the great online stuff headed our way; i.e., Metal Gear Online , PlayStation Home , and the vast number of titles already available that have online modes.
Anyway, here's the full list of games that will no longer be available online after June 30: