Compatible SSD for Macbook Pro (replace HDD)?
I don't think there is compatibility concerns, SSDs are pretty safe nowadays. Your model has SATAII, therefore the best SSD you can get is the Mercury Extreme Pro 3G from OWC (macsales.com). You can get a 115 Gb for roughly 200$, and your experience with your MB Pro will improve considerably.

I would not choose a smaller capacity though, as all SSDs with a capacity below 110/120 Gb are much slower, no idea why. And OWC's are the absolute best around, with a 3-year warranty.

Not only that, SSDs require a firmware upgrade from time to time, and OWC is the only company with a native Mac OS X updater. Much better experience in my opinion.

Enjoy the speed! :-)