I'm I the only one that still can't Yahoo! mail to push my e-mail?? It sits on the mail server, and will download and ding when I click into the Mail application. Otherwise, it randomly downloads mail occasionally, but definitely not instant Push. It's my only major disappointment with the iPhone.
I can't get it to push, either. I actually created a yahoo account just yesterday when i saw that yahoo mail supported push while gmail did not. I've tested it out several times now but unless I actually click on the inbox i get nothing. I thought maybe its because gmail is my default account still, but really that shouldnt matter... the point of push is that the app doesnt have to be up and open right?