Leaflets!
Brian Fling and Blue Flavor have just launched Leaflets - a new start page for the iPhone. I got a sneak preview of this last week and it's definitely very slick. The nicest thing about some of the apps is that even though they take advantage of the iPhone's UI strengths, they're not generic interfaces based on the current apps on the phone, but they've taken that next step to actually giving each "app" a custom design of their own.
It's very nice, if you've got an iPhone, it's definitely something you'll want to bookmark right away.
-Russ