backward-dir/forward-dir

[David Kulp <dkulp@xxxxxxxxxxxx>]

Is there a key binding that allows me to move forward or back to the  
next slash in a file path?

In emacs shell mode, M-b and M-f will move the cursor to the next  
level of a /long/path/to/file.
In zsh, M-b and M-f jump over the entire path.  But I usually want to  
make a small edit in an existing path.

Strangely, I have noticed that ":" also serves as a word delimiter,  
so M-b or M-f will stop on the colon for host:/path.  So that  
suggests to me that there's a set of word delimiters defined somewhere?

Thanks in advance.