I am a big fan of Blackberry and use a 7100i to push my email and some blogs via RMail.
The new Blackberry Curve has some great new features including instant messaging built in.
I would still like to see RSS push built into the service, the same way as email. RMail is good but it will only push the rss every few hours and it would be useful to me to have an immediate push.
Unlike my 7100, it has a camera and mp3 and video player out of the box.
This is definitely a contender to replace my current Blackberry.