* The layout of the pricing page is odd. Use the plan name as a column instead of a row. Most folks are used to seeing it that way - https://drone.io/pricing
* Do not start by showing the user a free plan. Users scan a page from left to right. Don't give them something they will easily choose right away.
* Get yourself a 'features' page that highlights what you offer in bullet points.
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.
Also, if I'm on the signup page and click the Drone.io logo, it just adds a # to the URL and doesn't go back to the home page.
I'm on a very slow connection and it's much faster to do a git push than to deploy a compiled application.