With a Codebasehq account also comes a free deployhq account. You commit changes to your git-branch and deployhq will ssh into your production server and update the code. Extra commands (e.g. rake db:migrate) can also be executed. It's basically like Capistrano but as-a-service, but easier to set up (and less versatile probably, but I haven't come across anything I couldn't do).

They're also working on Deliverhq, basically transactional email delivery like Sendgrid.