Well the ad place ment is ok, but in my oppinion the site doesn't look professional, I would recommand you to use another logo. Also use an other color scheme, this one is too boring.
Great ad placement. For your "ads by google" blue background (ad link units) set it to white instead for better blending.
Go over to the contest section of this forum and offer some money for a logo design. There are some very talented people here. Nice adsense placement by the way.