I've tried it a few times over the last year or so with no success on a Mac and with some success on Ubuntu but now
Darktable is proving to be a real contender. Nice work guys.
I will do a complete review of my progress with Darktable sometime soon using photos from an upcoming walk but so far Darktable seems to suit my simplified workflow very well; I'm old school and consciously try to keep my processing to a bare minimum.
I have tried Lightroom a couple of times but haven't been able to find a reason to change from Aperture. Knowing the ways of one piece of software locks you in much like being locked into a bank; changing is difficult and time consuming and of there's no benefit, well...
It's looking good. Take a look.