Sorry if this was already posted, but this looks like a good Productivity app. http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=293006734&mt=8
I found it overly complicated and cumbersome. I use Todo, by Appigo (I think). It was $10 but it has it all. You can click phone #s to dial, addresses to go to the map, emails, and urls all clickable. No, I am not affiliated with them. It's just that I've tried many of these apps and I liked this one enough to pay $10, after I tried the demo version. Since there are about 1001 apps with similar names, here's a link.