Glider is a program that you download and is run in parallel to your WoW client that will basically take control of your computer's functionality and "play" the game for you.

It can be set up to fish, grind mobs or even play battlegrounds.

It uses a screen scraping technique to identify targets (i.e. fishing bobber) appearing on the screen and then uses your hotkeys to execute game commands. Mob grinding and battlegrounds are done by creating waypoint maps for your character to run around and when it comes in contact with a killable target it will attempt to kill it using the hotkeys you have programmed.

For the website try a google search for mmoglider

WI has already previously reported on the Banwave that was executed several months ago (possibly even over a year now) when Blizzard logged the accounts of every person suspected of using Glider and then did a massive sweep ban. WI also reported on Warden, the pseudo anti-virus program Blizzard runs when you start the Launcher to check for any botting programs that may be running. (PS - I miss that column)

In the end, the gold farming botters will find another way. The really good gold farmers create there own botting programs and will not even be effected by this. The only people that will be effected by this will be the casuals that use Glider to level toons or farm materials. Blizzard might lose some members but it's not going to be a huge hit to their subscription list. Many players know the risk and will just start over after their account gets banned.

I have never seen a botter on my server yet, but I can't imagine banning botters is going to change the wow economy very much.