Scan the Whiteboard and save it as pdf! - The Camera Scanner

Yes, Now, you can do more than scanning your whiteboard if you've got an android phone with a decent camera.

You can even scan your books, Visiting Cards, Whiteboards (when you attend lectures), notice boards and everything using applications in the android market.

One such Application is Camscanner. There is a freeware version available. Give it a try.

PS : If you have taken pictures you can print those pictures as a pdf by using Pdfcreator (freeware) in windows.