Exactly. But all I see is since three years: "We would love to support Linux at some point, but unfortunately, we don't have anything to report on a timeframe"

You need a konsoleH account for the registration of 'special' domains not covered by the robot. One doesn't have one by default.

I think webspace users get a konsoleH account, too.

It's getting too slow, since it's one of the earliest MBAs and I'm doing a lot of developing work which requires running virtual machines. I had a look at the latest MBAs, but I don't know if they are as Ubuntu compatible as my current MBA.

If you're running VM, it should be perfectly fine. I read about some dual boot issues but I think that can be resolved.

I'm not running Ubuntu inside a VM, I'm running Ubuntu currently as dual boot. Just keeping a ~10GB OS X partition for eventually firmware updates. I want to do the same with the new MBA (if I buy one).