They've only sent out a couple to reviewers according to Jody at BFL.

The impression I get from that post is that they might, possibly, ship out a few (less than 10) units. Probably the only working ones they have, and probably so they can buy more time because they know the recipients will jump on here and sing BFL's praises. Which boosts pre-orders, which gives them more money to play with, and buys them time.