I use 1Password on my MBP and iPhone - have already purchased 1Password for iPad in advance on my iPad delivery here in Japan next week.. It's the only security program that I will use after a few years looking / testing I settled on 1Password and haven't looked back... Sync'n is a piece of cake...
Don't forget you can password protect indiviual apps in your system preferences on you iPad - no more access to your email, twitter, facebook etc., for the ex-roomate...:D
I use 1 password and do recommend it, if they were able to plug it into safari like you can on your desktop then it would be great!
Have you looked into Strip for a password manager app? It's totally straightforward and easy to use. People mentioned how convenient it is to sync--and it is!--and Strip just added a free companion tool called Strip Sync which allows you to sync to multiple devices.
If you want to check it out http://getstrip.com/c/forum