Following the principle of "release early, release often", I put live a very early version of the v2 API for joind.in today (so that I can use it in another project!). I haven't updated the documentation yet but in case anyone was thinking of consuming data from joind.in, this at least gives you an idea of the direction of the project so I thought I'd share.
The new service is RESTful and has a few working features already including fetching event and talk details, pagination and multiple output formats. You can find samples of the output here and here. If you're interested in seeing the source so far, check out the github account for Joind.in (and maybe even clone a copy).