1Password for iPad - Highly recommended
I've written earlier about how useful 1Password is - now it's available for iPad. I continue to highly recommend it to friends and colleagues. 1Password helps you quickly manage many web site accounts without re-using passwords. It also memorizes and fills in credit card numbers and software license codes.
If you're a Mac OS X user, 1Password is very easy to use. It integrates with Safari and Firefox to make saving and automating logins and generating new strong passwords super easy.
The iPad version makes it easy to manage many account passwords securely without having to repeatedly type in your password.
The iPhone application sync via WiFi and is helpful for storing secure notes, credit card info and Web application logins - though I find I use it less than on my desktop Mac.
Give it a try. There is a 100% money back guarantee if you're not satisfied.
They also have great technical support. There have been a couple of minor glitches with their iPad release, but the company support folks responded very quickly with steps to work around the problem until the next application update (which came the next day).
Disclaimer: I do receive a share of 1Password sales through referrals on this site.