Add a Next Commit button while viewing one commit (Git)

When I view a single commit, I'd like to be able to go to the next one with a simple link.

I know that in DVCS commits don't have to be linear, but most of the time, they are, so I think it would be useful.

Someone is reporting the same here : http://groups.google.com/group/bitbucket-users/browse_thread/thread/570d860413c59fc

But I haven't found anything in the issue DB regarding "next commit" or "next change". Hope this isn't a duplicate.