Jeff@soundnumbers.biz would be a lot better than using the hotmail email address you have on there now. Hotmail doesn't seem as professional to me, if I'm shopping around and run across a gmail, yahoo or hotmail address for a business I tend to move on. Getting your host to allow you some email addresses should be simple, and free.
Also, "Contact" probably should be capitalized on your tabs on the bottom of the page.
-Craig