Some people here don't know how spam actually works.
Just because MobileMe is a pay service does not mean you are any safer than someone with a free email host. What matters is this, do you use your @me address with friends, family, web sites, on forms, resumes etc? If you do you run the HIGH risk of getting spam email. The more you use (and post) your email address the worse it will get.
So for instance if you sign up to an online site like AppleInsider with your @me address you run the risk of getting spam. Certain sites sell their member email lists to third parties for this very reason....to make money!
Some people are really naive. You don't need a @me email to spam @me members.
hmm, interesting. i have one gmail account that i never -ever- use for online forms etc, and i have only given the address out to 3 or 4 close friends. at this very point in time, there are 172 items in the spam folder.