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.