My other post about early MMS & Tethering for AT&T didnt seem to show working results for me (some of my friends said it worked for them) so here is a new method I am trying.
http://www.krillr.com/blog/3DPQHBZ3/i-have-tethering-and-mms-on-my-iphone-and-yes-im-on-att
I’ll report back soon if it works.
[edit]
Tethering works fine, MMS seems to still be an issue.