Ideal feature list:
Do you think the desktop view should still be three column like the big screen view, or something different?
I can see the value in having something that uses notification centre to let you know the build status of your pull requests, but I'm not sure what you could use a vim plugin for. Not for starting builds, as you do that by pushing to a branch, and being able to view pull requests and their statuses in vim doesn't seem like a huge win over just alt-tabbing to a browser.
Didn't bother doing, feel free to pick up :)