Since MS recently added the POP3 support, I can confirm I get hotmail on my iPhone. I've had a touch and tried it last week and didn't work, got my iPhone 2 days ago and just added on minutes ago. Absolutely awesome. I wish they would release an official windows live messenger next for this thing. I hate third party solutions. Oh and just select "Other" and put in your hotmail addy and password (and the display name), the iPhone will do the rest.