Hi Chris.
I liked your site. But I think it can push away new users, because your site opens soooo long. I have very quich internet, and despite of it, it took about 3 minutes, while the site was opening.
The main image, with the basecamp newsletter sign up graphic, is 4,896px × 2,051px (3.34mb) which may have some bearing on load times. The black and white mountain image is 2,320px × 1,401px (no watermark). Why would they need such a massive image in a slide show? Silly and unnecessary.
There's many many validation warnings and code errors as well, probably due to the use of the $49 wordpress theme.
Doing a speed test the page size came in at 10.9mb and got a performance rating of 63 making it faster than a whole 16% of websites.
Could be improved some more.