Fantastic! Now I really have a reason to update to 10.6.4... darn I wished this worked on 10.6.x :/ Still most awesome, thanks

So, my memory is that this has worked for ages. Unfortunately, my last computer that hasn't been fully upgraded is sitting at 10.6.3, so I can't say from earlier than that, but it certainly works on that one, and I could swear that it's worked from long before that - I think at least 10.6.1 or 10.6.2. Can someone who actually has an earlier version installed give it a shot?

Unfortunately, this only disables the "move directly to a space" animation that that is triggered by jumping to a space with a modifier-arrow key or modifier-number key or switching to a program in a different space. It does not disable the zoom-out/zoom-in animation for moving from spaces overview to a specific space. I use that method of transition fairly often, so it would be very nice if there was a switch for that one as well (or at least a way to speed up the animation).

Nice. Not seeing the animation after using spaces since a week after it's introduction is a little disorienting, but I'm sure I'll prefer using this hint in a couple days. It's worth noting that the little gray box with white highlight representing the spaces still shows up, so it is still clear what is happening.

Personally, I'd rather keep the Spaces animation. I transition between 4 spaces (in a 2x2 arrangement) frequently throughout the day, and the transition animation is a great, minimally-obtrusive way of helping me keep my bearings. If I accidentally switch to the wrong space, I can usually tell before my eyes have a chance to recognize the contents of the windows, just by seeing what direction all the windows are moving in. That kind of perceptual awareness isn't merely eye-candy; it's actually useful!

Well, this doesn't disable the little spaces thing that pops up in front of the screen when you switch spaces. That still gives you a visual guide as to what space you are switching to.

Very nice hint.

And speaking of Hyperspaces, which I use and like a lot,
be sure to adjust the "Animation speed" in the Preferences: General.
I use 0.05 seconds now, and switching spaces is even faster now.
Nice!