There's 10 "last" USBs in stock at .15 btc for collectors and that inventory is left for the www.bitCanary.com sales.  There's no inventory otherwise. The USBs have sold out completely everywhere.  You can also find them on eBay I think.

Blades are available.  Everyone is awaiting on the Cube product which is pretty similar to 3 blades, roughly speaking... Cube should be more "consumer" friendly.