I think your feedback on the pricing page is great, and we'll definitely be making some quick changes to the design later today.

Regarding the Signup screens, I personally appreciate when websites use OpenID or OAuth so that I can use an existing account instead of creating a new username / password. That is why we chose to use Github and Google, and we hope to support more providers in the future (such as Bitbucket). I'd be interested to hear your thoughts.