Man, a 2000...okay, what you need to do is figure out which version of the mass meter you have. There were two versions for the 2000 boxster. If you take out the air mass metter, you can look at the serial number on the side of it to tell.
I got my MAF sensor at the Parts Bin (I think its
www.thepartsbin.com ).
My CEL did not go out, but that's because I had an O2 sensor that needed to be "plugged back in," so I don't know if it goes out on its own. I've heard that you should get the whole thing reset by the dealership, just to make sure there's nothing else wrong.
But DO NOT buy a MAF sensor until you know exactly which one you have. The only true way to tell is to take it out and look at the numbers on the side.
-Kevin