Change the Dock item click-and-hold behavior in Snow Leopard
Snow Leopard changed the way the Dock behaves when a Dock item has been clicked on and held down, since 10.6 it launches Expose for that specific application. You may recall how Leopard handled the click-and-hold though, which was to launch the contextual menu (the same one you get when you right-click in 10.6). Using the Terminal and the defaults write command, you can alter this behavior between the 10.5 contextual-menu and 10.6 Expose style click-and-hold Dock behavior. So launch your Terminal:
Show contextual menu rather than Expose when Dock item has been clicked and held (like 10.5)
defaults write com.apple.dock show-expose-menus -bool no; killall Dock
Revert to Expose upon click-and-hold (10.6 default)
defaults write com.apple.dock show-expose-menus -bool yes; killall Dock
I actually like the new Expose click effect (which is slightly different in 10.6.2 than it is in 10.6), so for me this is a matter of “If it ain’t broke, don’t fix it” but to each their own.
via Lap Cat Software

I like the wallpaper. Where did you get it?
Yeah i also think this wallpaper is great please give us a link
I found it on Flickr but I’m not sure if I can dig up the source, I’ll post it if I can!
Love this tip!
Here is a link to a similar wallpaper of a hazy Chicago skyline. Not the exact match, but close!
http://interfacelift.com/wallpaper_beta/details/1341/heading_west.html
thanks, this has been driving me NUTS. On my 10.5 computer I can quickly pause itunes from the dock, and view all downloaded items pressing an arrow — but the 10.6 laptop makes me jump thru hoops for the same things.
I may actually update the older computer now!
Thank you, thank you, thank you! You’ve just solved the single most annoying problem on my computer: when I’m pushing the machine to its limits, the dock often misinterprets a simple click as a click-and-hold, which means Exposé has to activate, slowing things down even more….