Their website says this:
Update: March 26th 2011. The shop section of Q-tuner.com will remain closed for a while. If everything proceeds according to plan, we'll reopen next year. In all probability, the current range of products will be replaced by the second generation Q-tuner. The second generation Q-tuner represents a true technical break-through for being the first all passive "smart" pickup. A patent application including a robust claim tree will be filed within a measurable time.
But does anybody know what time next year they might be opening back up or know anything about their other plans?