I'd be up for helping write something in Django/Flask/Similar (I'm into Python at the moment, I'd also be up for doing something in Ruby or perhaps even PHP). By using a framework, we'll be able to knock something together quite quickly - so even a simple Forum wouldn't be out of the question.
If we did all this without a framework, we'd spend half our time re-inventing the wheel. If our objective was to write a framework, then that's fine - but otherwise, why bother?
If we use Django's ORM, SQLAlchemy, or any kind of Database Abstraction layer/ORM, then we don't really need to worry about things like which DBMS we're going to use - it's abstracted away for us.
If the project progresses, I'd also be able to host it. I've got a dedicate server w/ OpenVZ, so can easily spin up a Virtual Machine to be dedicated to this.
Why don't we set up a GitHub organisation for CF.org? IMO, a ticketing/issues system along with some kind of VCS is a must.