Dan Pettit News! 28 Mar, 2002, 16:54 / 0 comments has interviewed Dan Pettit, JKII's producer on the LucasArts side.
What can you tell us about the walking on walls? Is it a brief effect, or can it be sustained for longer periods?

It's a fairly brief effect. The best way to gauge this is to review the video we just released on March 14th. The walking on walls effect shown in the video shows the longest period of time you can do this effect.
Dan Pettit was also the lead tester on The Curse of Monkey Island.