Do they work with the Evo and do they support 4G? A lot of ROMs I've seen don't support Wimax 4G.
To get wimax you have to use a sense based rom (Fresh and Myn are the best I've used) or you can run CM7 based. That's it.
The wimax code has been open sourced by TeamWin (part of the CM team) so sooner or later it'll make it into another AOSP rom.
And what other problems comes along with it? My buddy is runing some custom Rom and the GPS is screwed up. It's a known issue and he's waiting for a nighly build to fix it. Guess what, I'm running stock Rom and my GPS works perfect.
Sounds like cm7. To fix it takes half an hour. Instructions are readily available in the CM7 threads @ xda.
Personally, I prefer CM7 to all of the sense roms. Faster, cleaner and very intuitive. Obviously, ymmv as will your preferences.
Finally, CM is not vanilla android, that would be a "google experience" device (nexus one, nexus s). CM is AOSP (Android Open Source Project) and significantly enhanced from "vanilla".
Sent from my PC36100 using Tapatalk