Hi Thomas,
A few months ago I thought I might actually have some time to do a little blogging (ha!). One of the blogs I actually managed to write before work and family overwhelmed me was on this very issue. Here's a link to my experience:
http://www.kbeat.com/Site/Blog/Entries/2007/9/17The_Great_Debate%3A_Matte_vs.Glossy.html
To sum it up, if you're going to do this for a living, i.e. someone is paying you to do it, I wouldn't do image editing on a laptop display. Invest some cash in a quality external display (I have a 23" Cinema HD attached to my MBP when I'm preparing images for press or web), calibrate it properly with a Huey, Spyder, or whatever you choose (you can pick one up for under $60) and go to town editing your images knowing that your color will be spot on. Laptop screens, matte or glossy, just don't have the same color fidelity and accuracy of a good external monitor.
I calibrate my glossy MBP screen with a Huey Pro, and it gives good enough color that I can shoot remotely and trust my color balance and exposure (less of an issue with RAW anyway). I prefer the Glossy for things like video and slide shows, so that's why I went Glossy. If, however, you simply aren't in a position to add an external monitor to your set up, and if you want to be as accurate as possible from screen to print using your MBP display, matte will give you better results.
Hope that helps!