For those that speak github it's the bootstrap branch here:
For those that don't there's a zip of the bootstrap theme here:
Which should just work (well, to an extent) if you drop it into the theme directory as per usual.
There's quite a bit of explaining necessary as to how this all fits together, what I'm trying to achieve and plans for the future etc. but I didn't want to make anyone wait while I get around to writing that and finishing off various bits and bobs.
So, it's not (yet) ready for production use, it's currently evolving quickly but feel free to have a dig about in the code or try the theme to see what you think. There's various things that are broken, missing, unsupported at the moment e.g. it inherits the standard Bootstrap width, which is probably too thin for Moodle and though that's very easy to fix, I just haven't done it yet, but there's also plenty of good bits that can be easily lifted and re-used in your own themes if you kind of know what you're doing.
I'm not sure I'm ready for bug reports at the moment (though I'm hoping I will be soon), but an extra pair of eyes on the code and fixes and contributions are very welcome if anyone wants to build their theme on top.