Top message: (Rich Brome) by Griffin
Replying to: Re: (Rich Brome) by casey13
They offer SMS and WAP. They charge a dime per message sent, and a dime per "content page" on WAP. Receiving messages and navigating WAP menus is free.
A photo service would fit perfectly with their model - they could simply charge 50 cents per photo sent, for example.
I should note that AT&T goPhone also offers data services.
PS: Since Virgin uses CDMA, it's technically 1xRTT, not GPRS - same idea, though.