For very limited definitions of "hit the market". There's something like 5-6 boards out there now. Last update from Mike was that the rest of the first batch of ca 50 won't be available until mid November. Most or all of those are likely spoken for by those of us that have already e-mailed him, so general availability for people who want to order it is likely still a couple of months away when his next production run is ready.
Depends what you're looking for, I suppose. With the 68060+ethernet daughterboard, it'll already be more powerful and flexible than most A3000/A4000 setups unless you're willing to spend a lot of money pushing old unreliable expansion cards into an A3000 or A4000.
There are 18 boards already shipped. I have another 42 on my desk.
I have a whole list of people to mail back, sorry it's been a bit crazy in China this week.
I still have work to do on the new firmware.
Support wise, the Replay platform is the only open-source solution.
You will start to see much faster progress and more cores as the other developers start to come on-line.
/MikeJ