Open Blog 3.0.0-beta3 is now available. There's been a few bug fixes and we're getting close to a release.
Apologies for the delay, work and life has been a bit busy.
I've been working on the Open Blog website and we'll soon be offering to host themes for the blog so you can offer users themes other than the default one we provide, even Admin themes. Keep an eye out for that blog post when we go live.