Games do still sell on the PS2, so it's not going away for the foreseeable future.
For example, take a look at Madden 08 on the PS2. It still sold over 2 million copies! It's only a 100k or so behind the 360 sales of the game. Next year the gap will most likely increase a lot more between the two, but there are still lots of sales to be had from making PS2 software. It's not going anywhere.
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3."
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"