Sharp Hiptop 3 / Sidekick 3

I'm confused, if you look at the email demo on www.sidekick.com it clearly shows the sidekick 3 using a hotmail email address as part of the push feature, however I read a review where it stated that it didn't support hotmail or yahoo? I found this strange as it supports both of those programs' IM? I would appreciate if someone can enlighten me and clear that up.
Also, how bad is the battery life?