Those of you who have a jailbroken iPhone will probably remember ContactFlow [iTunes Link], the jailbreak app that brought coverflow-style management to your contacts. Turns out that the dev decided to go legit and removed ContactFlow from Cydia to submit it to the App Store.
When you launch ContactFlow, you have access to all your contacts. Just tap on a contact to flip the picture and display associated numbers and e-mails. By selecting a number, ContactFlow will simply call your contact. The SMS icon automatically send you to the SMS application. By the same way, in ContactFlow, selecting an e-mail will send you where you can write a new e-mail.
ContactFlow is available from the App Store for free for a limited time, so get it while you can. In the meantime, have a look at this video demo to see ContactFlow in action.