I have been working for quite some time on Marcato. Marcato provides site-specific browsers for your iPhone.
I use Facebook to keep up with family and friends, but Facebook's approach to privacy gives me pause about running the Facebook app or logging into Facebook with my primary browser. On the Mac I use a Fluid site-specific browser to visit Facebook, but there was nothing similar for iOS. I also prefer to use either a dedicated app or a site-specific browser when logging into financial accounts. I use Fluid to do this on the Mac, but there was no similar offering for iOS. So I decided to write one.
If you are an iPhone or iPod Touch user and would like to beta test Marcato, please email me.