As Lhlalyam pointed out, there's quite a bit of space between the logo and the top of the browser window. I'd cut that in half. Otherwise, I really like your site! Very useful.
WoW! I just love it, Logo is awesome Yes, Still there is extra space between Address bar and the Logo, but overall its fantastic Thumbs up!
Definitely a great design! I like it alot! You could use a little of the space for ads though. This way it would offset your cost of hosting, plus your time in design and tweaking. Bring the header image up to the top, then add some non-invasive adsense ads in the space between the image and the text field. Then do some simple SEO, promotion/advertising, and you'll start to see increasing traffic. PM me if you'd like a hand doing any of this!
Very Simple. I like the design and there are are many people out there that would jump at the opportunity to use something like this. I would include some further explanation as to how it works and what the benefits are though. This will help people understand your business better and will ultimately help spread viral word about your site and it's services. Best of luck.
It's looks nice the website... the problem is that the space where the users inserts the url is not centered in the vertical. If i had a pc with 800x600 i didn't see that website exists.