I was wondering the same thing. I saw the twitter announcement, but nothing on the website or forums. Maybe it’s to announce that the RB2011UAS-2HnD-IN will be available next week? Although, it should be according to my supplier.
As usual, I can only comment on announced products. If the device has not been announced, it means we are still only considering it. If a lot of people will demand it, we could make it.
Could you clarify how you would use it? Racks are usually in server rooms, what would be the use of a wireless card in there for you (give personal example please)?
I have many rackmount cabinets at clients where I prefer to keep everything as tidy as possible. This could replace a router on a table with a neat installation into a cabinet, providing them with their internet and AP.