Nope. KNC is the only 28 NM box out there that I know of.
Of course who knows what is mining away that isn't for sale.
Ignore terrahasher. he's a conspiracy theorist.
neither hashfast nor cointerra have yet shipped though both are imminent.
hashfast has chips back from the fab but seems to be having other production problems and has yet to show it working and to announce final performance & power consumption figures. Its about two months late, but still (with days to go) within their contractual delivery period. theyre still claiming they will ship the batch 1 customers before year end (and i hope they do as im one of them!) though its really tight to achieve that.
There was a trip report by Eligius a few days ago that showed a photo of a system running at 424 GH... which seems to be pretty much on spec. it was claimed to be underclocked, but we're not sure, as 424 GH was the previously announced spec in their own documents. Hopefully there's still margin for overclocking as well as their web site says they got it running at 500 GH and claims its the fastest bitcoin mining chip in the world but there's not yet an official demonstration and scant details of that feat. since cointerra's is specced to run at > 500 GH, that claim may be true this week...
cointerra are expecting chips back any day now (late dec - according to their schedule) and are expected to deliver the january production batch pretty much on time (ie: in january - though the original late december batch has pretty much been moved into january with the customers' blessing and some compensation from ct). we're expecting them to show a working box within the next couple of weeks (early jan). theyve shown everything else is done... ie: box, board, cooling system etc so confidence is good at this point that they will deliver in jan. there've been a few trip reports, including one i did a couple of weeks ago (on my way to the Inside Bitcoins conference in vegas)
At this point, the only people who have successfully delivered a working 28nm product are KnC... and even they arent shipping right now this minute. They say theyre waiting for hashfast to deliver before they resume shipments. I have several Jupiters and theyve been very good for me... and theyre busy hashing away. im impressed with KnC's attention to detail and customer focussed attitude. Theyve done a lot to earn their excellent reputation and they proved it was possible to go from Tapeout to Customer deliveries in two months. But their products are more expensive (measured in $ per GH) than the newer competition... so there is a dilemma... to order from the proven reliable people or wait for the newer more competitive people.