Interesting idea. How does it differ from using Dropbox + Keepassx though? Frankly, I feel safe when using that setup. I read your FAQ and such. I found that,

Interesting idea. How does it differ from using Dropbox + Keepassx though? Frankly, I feel safe when using that setup. I read your FAQ and such. I found that, for a 'security' product, it was light on the security details. Mentioning encryption once and not much else. Expanding on that might put a few people at ease. You may also want to include a comparison/benefits sheet in contract to existing solutions(like the one I mention). People are going to be reluctant to hand over their login credentials if you can't quell those fears. Otherwise, best of luck! Edit: I hope the above doesn't come across as an attack, so much as a serious of unsolicited suggestions :)