Can't speak for Yahoo mail, but Gmail will be pushed plus more. Gmail on Android and iPhone is actually using Microsoft Active Sync, which provide an experience as close to Microsoft Exchange as you can get.
I guess what I mean is that on the BB i simply get an indicator thet I have email, then just hit the message envelope and the message just opens regardless of weather it's yahoo or gmal
Yes, it is the same, consolidated message box for all message, for Android OS 2.0. Motorola Droid runs on 2.0. HTC runs on 1.5/1.6, depends on carrier.