If you want you can take one unit and test it )
Can someone please add a link to these usb devices? I saw some discussion here some time ago but at that point theye were not selling them one unit at a time, one had to order something like a thousand units at least AFAI remembe...r
https://bitcointalk.org/index.php?topic=195004.msg2025318#msg2025318 but there are group buys (go up a level into custom hardware threads).
[Edit] after all I've been bleating on about the last couple of days. I put in a typo that contradicts myself. Sigh.
It might be worth it at 1.0 BTC, but not 2.0 BTC