Guys Necrosan over at xda hacked the sprint hotspot. You can now connect to the internet using the native sprint hotspot. Here is the thread to read up on it. I tested it on marcus's RC10 rom and SFR 1.2 and it works. It didnt' work on the bonsai B13 rom.
Davidrules7778 made a zip flash for ec05 roms.
[Hack] [EF02 ONLY] [Wireless Hotspot] Native USB/Wireless Tether - Page 8 - xda-developers
[Hack] [EF02 ONLY] [Wireless Hotspot] Native USB/Wireless Tether - xda-developers
I'm not sure if this will create any charges on your account though.