Brutalal released his glitch publicly:
http://www.youtube.com/watch?feature=player_detailpage&v=_9gKdr37gsIRead the video for more information. Basically:
The Menu Glitch can be used to manipulate which field you want to go to next.
How-to:
Exit a field and get a battle on the same frame. Menu glitch the battle (you don't enter the battle).
The battle ID is read as the field ID and you go to that field.
I'm about half-way through the TAS.
At the current rate, when this is used with the 'data error' glitch, I should be able to complete the game in around 3 hours 30 minutes.