Top 3 Reasons I want the 9900
1. More RAM/Internal Memory
I love my 9700, but I want/need more memory for apps and smoother UI experience.
2. Bigger Keyboard
I never had the 9000 (I'm on T-Mobile), but I'm really looking forward to the form factor. The 9700 keyboard is just a bit small for my taste (and thumbs).
3. Better Browser
Could it be? A browser as good as Android/iPhone? Even something close would be nice.
Regardless, I can't wait (well, I can, and will wait...somewhat patiently) until it lands.