This one is extremely handy and I'd like to find similar examples for other SMD package types if their the Eagle .sch and .brd files are available on-line somewhere:
http://my.opera.com/raphman/blog/2007/10/24/smd-to-dip-adapter-board-layouts
http://my.opera.com/raphman/blog/2007/10/24/smd-to-dip-adapter-board-layouts