I really like the status bar with the arrow-breadcrumbs look. I will definitely be incorporating that into my config.
If others are looking for a great config to start out with definitely check out Brian P. Hogan's tmux: Productive Mouse-Free Development [1]. It is a great quick intro to tmux that demos and steps through the creation of a great tmux.conf
The status bar with the arrow breadcrumbs _looks like_ powerline. If you read his tmux config, he's not actually using powerline, he just duplicated the appearance.
If others are looking for a great config to start out with definitely check out Brian P. Hogan's tmux: Productive Mouse-Free Development [1]. It is a great quick intro to tmux that demos and steps through the creation of a great tmux.conf
[1] http://pragprog.com/book/bhtmux/tmux