Password Security Suggestion--Key Fobs

[NoahSD]

(This is not my idea. It was originally posted by shawny boy in this thread about a poster who was hacked.)

A key fob is basically a little key chain with a digital display. The display shows a number that changes about every 30 seconds, and in order to log into your account someone would need your screen name, password, and this number.

So, a keylogger would no longer do anything because the hacker would only receive your username, password, and a number that's no longer valid. We also wouldn't have to worry about letting our friends use our computers, as long as we don't give them access to the key.

It sound like it might be really hard to implement, but PayPal's offering them to clients for $5 each, so it can't be that hard. (link)

Is there any reason why the poker sites shouldn't be working to implement this as soon as possible?