Upload & Download speed in Tmux status line

With the exception of the red brackets around the highlighted window, this is the closest approximation that I can easily configure in tmux 1.5:

# default statusbar colors
set -g status-fg white
set -g status-bg default

# default window title colors
set-window-option -g window-status-fg white
set-window-option -g window-status-bg default
set-window-option -g window-status-attr dim

# active window title colors
set-window-option -g window-status-current-fg white
set-window-option -g window-status-current-bg default
set-window-option -g window-status-current-attr bright

# statusline
set -g status-left '#[fg=green][ #H ]['
set -g status-right '#[fg=green]][ #[fg=blue]%Y-%m-%d #[fg=white]%I:%M #[fg=green]]'

If you want the highlighted window in red, use:

set-window-option -g window-status-current-fg red

If you don't mind typing directly above the pane border (which you have to do anyway for any panel that doesn't touch the status line), you can force tmux to use a smaller window:

set force-height <single_window_height - 1>

However this only is a per-window setting and acts as maximum height limit hence it won't do what you want when you change your containing terminal dimesions.