This looks pretty promising. I'm also very happy that they used LESS instead of SASS for their CSS pre-processing. I'm excited to see where this project goes.
Why do you prefer LESS over SASS? I prefer the latter, only because of how well it plays with Compass and the command line watch/compile it provides. I have tried all of the Less GUIs, but they only disappoint, and I have not yet found any similar command line tool.
I'm sure similar tools exist for the emacs/vim communities.
I'm a massive LESS fan, but I'll admit one of the biggest failings in the tooling is the lack of upstream saving/compilation. Compiling on save is one thing, but if it doesn't recompile the manifest, it's useless.