Press 'f' when keynav is active and instantly jump to my firefox window.

# in .keynavrc
f sh "activate-firefox.sh", end

Now, in activate-firefox.sh:

#!/bin/sh
# activate-firefox.sh
xdotool windowactivate $(xdotool search -title -- '- Mozilla Firefox')

Extend that and press 'g' to jump to gmail, assuming that tab is open. (Requires my firefox tabsearch plugin)

# in .keynavrc
g sh "activate-gmail.sh"

Now, in activate-gmail.sh:

#!/bin/sh
# activate-gmail.sh

./activate-firefox.sh
xdotool key ctrl+apostrophe
xdotool type gmail
xdotool key Return

Hop on over to the keynav project page and download the new version.

The changelist from the previous announced release is as follows:

20080614.01:
  - Several bug fixes and feature additions suggested by Yuri D'Elia.
  - Sync xdotool library to 20080606
  - Added default key binding Ctrl+[ as 'end' (requested by Luke Macken)
  - New command: 'sh' - Executes shell commands.
    Example keynavrc: ctrl+x sh "xterm -bg black -fg white"
  - New command: 'history-back' - Undo a window change operation
    Example keynavrc: a history-back
    + Such operations include: cut-*, grid, cell-select, move-*
    + The history size is currently hard-coded at 100 entries.
    + If you exceed 100 moves, the oldest entry will be removed.
    + Every time keynav is activated, the history is wiped.
  - Fix: Any command starting with "start" is now bound globally.
  - Fix: All rendering is delayed until after the end of the current command
    sequence. This fixes (in order of annoyance, worst first):
    1) Crash when a 'start' and 'end' exist in the same command sequence.
    2) Visible 2x2 grid first, before a 3x3 grid when the start command is
       'start, grid 3x3'
    3) Rendering blinking a full white window on the screen before clipping to
       the grid.
    4) Visible blink when "cut-left,cut-up" and such are run simultaneously.
  - Fix: If the 'start' command is invoked again while keynav is active, then
    the default arrangement is set (full screen and 2x2 grid). Previously, the
    'start' command was a no-op if keynav was active.