While we're on the topic of non-bash shells, I recommend taking a look at Fish: http://fishshell.com/

I wrote a tutorial on how to install it on Mac OS X and Ubuntu: http://hackercodex.com/guide/install-fish-shell-mac-ubuntu/ For me, the chief advantage to Fish is that you get more functionality out-of-the-box than with most other shells, including zsh.

I also published two related projects for easily sharing Fish shell enhancements — Tacklebox https://github.com/justinmayer/tacklebox and Tackle https://github.com/justinmayer/tackle) — because I wanted a way for folks to be able to have access to multiple plugin repositories and easily share their favorite shell snippets.