KnCMiner has begun shipping the "Bonus Miners" to all those that ordered Neptune's as part of the original "Customer Appreication" batch.  (The Customer Appreciation batch was the first batch of Neptunes that was only made available to people who had previously purchased Juputer and other previous-generation KnC machines.)

I have no idea how many of these Bonus Neptunes are going out.  Could be hundreds or thousands (some people converted their Bonus Neptune order to a Bonus Titan order--Titan isn't a SHA-256 miner.)  Each one can hash at around 3.3 TH.

I have not personally received any shipping notification of mine yet, but there are a few posts on the KnC forums that have received their UPS shipping confirmations and at least one person that has already received the Bonus Neptune.  It seems some people aren't even bothering to take them out of the box, though.  So if they aren't mining, you may see a bunch of Neptunes pop up on eBay soon.  Since they didn't take it out of the box yet, people are wondering whether it is actually new, or a used unit taken out of KnC's farm.