I am still trying to get a grasp on how this would simplify things. If we just had one site we listed at, sure, but with 7, I don't see the practicality of doing anything other than having [vote send you to the homepage of WP.
Creating a script to autovote all 7 is a violation of the terms of those voting sites.
What if the [vote command opened a browser window for each vote site? Then a player would merely have to cast his/her vote and close the window, moving on to the next window.
GhostRIderGrey