I try to release every fortnight, on the weekend, although it doesn't always happen, and a release will slip to a third week.
You can read about upcoming developments in the Dev Blog. This is also where I will announce releases.
There is only a few more things I would like to implement before releasing the fabled 1.0 release. These are listed in the issue tracker as "blocks-1.0".
If you have any feature requests or bugs, the best is to list them on there too.