And don't do what my friends keep wanting to do.... use a shop vac. Some of those little chips and do dads inside are there for a reason.
well, in the absence of compressed air, I just used a tooth brush and dustbuster to clean up my keyboard. Slick.
And, you can buy detailing attachments for a shopvac that work really well for keyboards ;-) I wouldn't take it the inside of a cell phone mind you... lol.