i'm running OMJs wm6.0 RevA/GPS rom and it has been flawless for a week now. no crashes. i highly recommend it. its in his FTP directory.
there's no APGS (like all the current roms) so gps lock takes about 1-5 minutes initially. no GPS priming is needed, just works. click google maps or windows live search, and wait. sometimes windows live search times out, just tell it to "get gps position" again and it'll lock . turn by turn works great as well.
ftp://up.ppcgeeks.com/Vogue/Users/OM....WM6.0.GPS.exe
its actually more stable than the ALLTEL rom itself.