Ok, a few points here /engage rant mode
CDMA support - There are no drivers available from the community, and the manufacturers are very closed about them so reverse engineering an open source version is extremely unlikely. This has nothing to do with HP, it's the people making the chipsets. As a side note, the vast majority of the world runs on GSM networks.
/end rant mode
Advice for people wishing to buy a GNex to support this, I look at it this way - Will I be getting a Gnex? Not any time soon no, because this is still very early stage stuff and I'm a) not brave enough to accept the higher risk of bricking a device, and b) I don't have the technical skills required for this stage. If you're happy to accept the higher risk of bricking the phone n have the technical ability to get in and play then I would suggest discussing it with the Ports team over on the IRC channel to see if/what you can do.
For the rest of us, sit back, relax, and wait for updates till the time comes when we feel comfortable enough, on a technical level, to join in.