I think it's equally popular and we're working on supporting Mercurial as soon as possible. A lot of our users have already expressed that they want it (http://

I think it's equally popular and we're working on supporting Mercurial as soon as possible. A lot of our users have already expressed that they want it (http://appharbor.com/feedback http://appharbor.com/feedback) - and we're in the business of making something people want