You can use Google Authenticator.

It only makes sense if BTC appreciates significantly or you'll be able to send the cards back at 50-70% of their cost in 9-12 months.

If you consider yourself an advances user, check Armory. Alan is a super nice guy, and the latest 0.88 release is  solid.

bump

Hi,

I want to bid on the ASIC miner auction, don't want to spam the forum with 5 unrelated messages.