Can I get windows 7 like window resizing on Mac OS X? Windows 7 has a nice new feature for moving around windows. 

The one that I am particularly interested in is: 
Windows Key + Left/Right : Move the window to the left or right of the screen, or over to a second monitor.

But, Windows Key + Up: Maximize the current window and Windows Key + Down: Restore or minimize the current window. are also quite useful.

Is there anyway that I can get this functionality in OS? Preferably replacing the windows key with Command Key.
Shift It

If you read this Article I think you get what you want.