And what do you do after it self desctructs and you no longer have any of that data?

I understand the novelty factor here (it IS kinda nifty) - but folks who travel alot might prefer an online password manager, to a keychain.

I wrote this post a while back on the company blog comparing the two:

http://passpack.wordpress.com/2007/01/29/online-vs-offline-password-managers/

Cheers,
Tara