Hi,
My name is Mykhaylo Terentyak, I am from Ukraine (Eastern Europe). I can create very modern UI for you with the usage of WPF - the most powerful technology from Microsoft for UI creation. A lot of applications in Win 7 is written with the usage of this technology, so if you want your app to have success on the Win 7 platform then please contact me.
My rate is $13 per hour. Estimated time is 2 month, it is not possible to create you that designs faster. You can fins some of my works in my portfolio at oDesk.
I have also graphic designer which can create you some new icons.
Please contact me, we can create great application together.