The macbook screenshot is showing off the laptop more than your application.
I'm not a designer, so I'm particularly interested in feedback about the colors. Are they too dark? We want to look professional without looking enterprise-ey; all of our competitors are mind-numbingly enterprise-oriented and look like Microsoft did their design. We were also hoping the macbook would polarize our audience (hackers and small companies).
try and summarise what the purpose of the site in 20-30 words on the home page to de-clutter...more detail can be added in a FAQ type section
It isn't about whether it looks like Microsoft designed it not but what works effectively. There are a lot of companies that have created a product that doesn't look like it is enterprise oriented in the area you are working on example, http://www.pivotaltracker.com/. I personally don't think the macbook image would in anyway convince me, hacker & small company, to use your product. I am more interested in your product not somebody else's. Hope that helps.