Safari 4 (Mac and PC), Firefox 3.6 (Mac and PC), and Internet Explorer 8 (PC) are fully supported.
Well, well, well, look whose browser is not invited to Apple’s MobileMe Mail beta program.
Of course, there’s no Opera, either.
A lot could be made of this, but it’s probably nothing. It makes sense for Apple to focus the beta program on the latest IE and Firefox, as well as their own, browsers. But it’ll be interesting to see if Chrome gets a shout when Mail is out of beta.