I use Mint.com, they have an iphone app but does not look like they have updated it for the Ipad. I like it a lot as a Mac based app. When I started using it, they were a private company and then sold to Intuit I believe. This would be a great Ipad version addition.
An update on the Mint.com-I just pulled up the web site on my Ipad-looks like they have made it compatible with Ipad, will have to sign in later to make sure, will also need to add it to my 1password.