I have an Android phone + iPod touch, my girlfriend has a Blackberry Bold 9700 and, at the office, we devellop software for all three. If all you care about is business-type stuff, then Blackberry by a landslide. My girlfriend frequently goes 5-7 days without charging and she uses it a lot (not "heavily", but a lot). It is well-thought and the keyboard is excellent. The applications are a bit on the ugly-side (compared to Android, or even the iPhone), but they are very functional.
The Bold 9700 has a pretty high resolution making everything onscreen easy to read and not causing eye fatigue (it provides the same DPI as the better Android phones and the new iPhone 4), but on a smaller screen.
Additionnal: By comparison (based on my phones and what we see at the office, the 5-7 days would translate into 1-2 days for android phones like mine (Xperia 10) and 1.5-3 days with newer iPhones.
Last edited by EFalardeau; 09/29/10 11:27 AM.
