Got my Crucial M4 128GB for $95 months ago, worth every penny. Only game I have on there is Minecraft, other than that I don't care much for faster loading times in games. Opening programs or loading files is a breeze.
They're not for general storage at the moment, they're most useful for the OS and programs, and 128/256 GB serves that role quite well. You really don't comprehend the difference until you have a SSD. I absolutely hate working with a computer that doesn't have one now, and so do all of my friends that I convinced to get computers with SSDs.
Don't trust the smiling penguin! http://backloggery.com/mydogskip93
Got one as my boot drive. No complaints really. $90 for a 120 GB, and it's nice to see typical stuff like scans and installations blaze by. It hasn't changed my world or anything, but again, it's nice and suits my needs. I do plan on getting a 250 GB dedicated solely to I/O heavy games, even though they're all a bit pricey.