[jimfun]

I had something similar happen, and it just took a little time to resolve. My steps:
1. Reinstall Sprint PRL and Profile
2. Reboot (soft reset)
3. Start profile and let Sprint churn away at provisioning phone.
4. Several (3, if I recall properly) restarts and profile updates later, phone and data working.
5. Hit PRL update
6. Re-install any CAB files updating internet settings for speed

I had the issue after I installed a ROM, had to hard reset twice, and somehow "lost" my data capability. ##DATA# showed no settings, all was zeroed out.

Good luck!