Push E-mail is supposed to be instant – as soon as I receive an e-mail in my inbox, I should get an alert on my phone. However, Yahoo’s service sucks ass – it doesn’t notify you as soon as you get an e-mail. I have a GMail account being checked every hour, and sometimes I receive e-mails on that quicker than I do on Yahoo (I forward all my GMail stuff to the Yahoo account just for the push feature, because I was under the impression that I would know instantly when I get an e-mail). I can’t wait til GMail comes out with Push, if ever.