Hi @nikko,
Sorry the Linux version is taking so long! It's on the release schedule for two updates from now, which should be somewhere within a month or so. I'm hesitant to say an actual date because we've had some unforeseen delays lately. The good news is that Rob has already started the Linux implementation, and he's friends with the Bitwig guys so your setup should be rocking once we get things up and running.
Regarding testing, I'll check with Rob and let you know. Normally, we use a software testing service, so I don't want to get your hopes up too much, but we'll see... Talk again soon!
All the best,
Taiho