Hi, I've started to collect all POSIX header files that need implementation for my projects (mainly libcoap). I know Christian is interested, too since he is trying to port ccn-lite and redis. I opened a gist to collect those header files ([*] means needed, [+] only needed for tests/examples/...) and I will detail this in the next days. If you are working on POSIX related projects right now, feel free to contribute: https://gist.github.com/authmillenon/6764381
Discussions about the current POSIX socket implementation can be found in PR 226 https://github.com/RIOT-OS/RIOT/pull/226
Sincerely, Martin