We don't have any strict schedule, but I aim approximately to make a beta release every week and a stable release every 6 weeks (originally I planned every month, but I think that was too short). There should be a new stable release in the next few days.
However, I would strongly recommend updating to every stable release as it comes out. This will prevent you running in to bugs and problems that we've already fixed. On the other hand there may be new issues, but you can let us know about them, fall back to the previous version, and keep working.