Thanks, you guys! Looks like I have a couple options. Sweet.
I'm still using my SERO account, so I assume unlimited data will work with Sprint Navigation at no extra charge.
W
P.S. The stock ROM was making me not like the phone. This custom ROM makes it so much better for me. I really like playing with the phone now. Still so much to learn and do with this puppy (This is my first smart/PDA phone.)