This version is now out. It's the hugest we've done so far in terms of both content and in file size (even more so than 0.405). Lots of goodies here!
There was a larger gap between releases of 0.405 and 0.407 than normally we would want, but the multi-well functionality was a huge undertaking and broke a lot of parts of the game temporarily while we were developing it, so we wanted to make sure and get all that cleaned up and well tested before we made even a beta release of something so central as that. Version 0.408 and other upcoming releases should be much quicker to arrive, as even the networking and VS modes won't touch as many parts of the game as the base multi-well functionality did.
Stay tuned!
Updates in 0.408:- There was a bug in 0.407 preventing new players from doing much aside from updating the game (this is a beta, but we try not to let stuff like that slip through). The update is a quick one, though, if you already have the game, and we're in the process of updating the installers to 0.408 to prevent anyone new from having that issue.