It's been a while since I reported on anything P25 related.
Much has been happening with the op25-dev group.
The code is still on the private sedition repo until they are ready to make an initial release and the current re-engineering of the code has been held up by a need to complete a thesis.
Apparently the plan is to re-home the repository on CGRAN or Google Code before the year end and make a public release at the same time.
If you are not familiar with the work going on, simply put; it's a Huge interoperability stride for narrowband digital radio.
An interesting suspected fork of this work is a package called the Digital Speech Decoder.
This already decodes C4FM off a sound card with a discriminator connection, and it error corrects.
If it was possible to take this a pipe it back out a sound card (without passing it to mbelib) to a transmitter in theory you could build a P25 repeater using a computer and a couple sound cards with the appropriate discriminator and varactor connections.
Jonathan Naylor, G4KLX has done this sort of thing with D-Star. And I found it most impressive.
From there the raw IMBE bit stream and headers could be IP encapsulated, sent
over the internet for the purpose of P25 repeater linking.
I don't know how many P25 groups are out there, but I'd encourage them to get the
word out to anyone with the potential programming talent.
And possibly place a bounty to help encourage this type of development.