Art for iPhone App

I need a user interface for a timer for martial arts. This will be like any other, with the options for a rest period, and probably a few more indicators. I will handle the code. I need a logo (already existing, might want to be modified) to be placed on it. Basically, I just need a designer. Show me your portfolio, and I'll get you more details. I know everyone says "It's easy, I just need ____" and they're usually wrong, but I'm serious when I say only a few screens. And I will try to give as many details as I can before you start, but realize you will be creating the UI. You decide where the buttons and screens go, I hook them to code, and tell you what functionality you're creating the looks for. You may boss me around in this one, regarding design. Check out the timers at [login to view URL] (there's more if you search for timers) to get a visual. However, I would like a more styled interface than usual! Don't worry about the numbers, I'll find graphics for that! Thanks