I personally like keeping my projects in a nested directory.
For example, if I'm working on a project foo, then the git repo would be cloned at ~/dev/foo/foo.
With this structure, I can keep additional things needed (such as testing environments) for foo in the outer foo directory, without interfering with the repo.
However, fw doesn't seem to support this. It would be really awesome to have this, as fw currently wouldn't work with some of my projects for that reason.