Looks sharp, but it looks like it's somewhat more orientated towards businesses - this isn't a bad thing, but inline with the original HN request above, I think you will likely need two workflows: business and 'public'.

The public workflow would need to be super-simple looking (that whole web 2.0-ish look 'n feel) with prominent search. Perhaps something like: chcheck.com/business vs chcheck.com/public and chcheck.com/ would represent the user's path choice.

Just some thoughts - perhaps you're already moving down a similar path. Best of luck!