Thats a great idea! I decided to set it up myself. This is what I did.
Under global, I created a new action with two commands
the first comman was "Windows-active window"
i used the caption "X's Buddy list Window" where X=my screen name.
Then I made a second command "keys- send keystroke"
[alt_down]a[alt_up] [down] [down] [down] [down] [return]
that right there will bring up your first away msg upon using the gesture. you could also remove the series of downs and just put in a letter, which would then give you the first away msg that starts with that letter.