QuarkXPress 10 is now cocoa based and have the functionality, in which you can DOCK the palettes. To dock the pallets in QuarkXPress 10, you just need to drag and drop the pallets on either side of the Mac to get them docked automatically. Docked once, you can rearrange the pallets again by dragging them to other position.
For more information please go to the link below:
http://www.quark.com/Products/QuarkXPress/Default.aspx#3