I bought my daughter the Rumor for her B-day. This phone is freakin awesome for a 13 year old. She gave up Nextel's PTT in favor of more texting and IMing. It has push mail.
The Sprint rep didn't even know this. It has text tones to identify who is texting her,MP3 player, and picture mail to name a few. The best part, her unlmtd data plan is only $10 monthly. I can't wait for her to go to bed so I can play with it.