Fully functional phone, plus a very usable thumb keyboard, small form factor, full PDA, e-mail, web and IM capabilities.
airisuu you may want to take a look at this. This seems like a very good email device with IM without the cost of the older Blackberry's or the Sidekick's bad phone reception.
And get this, $200 with rebates and a service plan with T-Mobile. Which is much more affordable then the Sendo X I was talking about earlier.
This thing may actually let me leave my Palm T3 at home and use this as my main PDA and cell phone.
Hmm... time will tell. I'll go play with it in person once it hits the stores in October.