I really like the Windows 7 "snap" effect. That is, when you drag a window to either side of the screen, it resizes the window to be half the desktop size.
I also like the "live preview" that creates a thumbnail when you mouse over something on the task bar.
However, I'm running Ubuntu (Linux) 9.10, I am curious to know if there is a solution (not using virtual machines) that will mimic these effects on Linux, thanks!