Straight fromt he Apple website:
Move to Mac
Easily transfer your photos, music, and other documents from your PC to a Mac.
Well help you move.
Buy a Mac at an Apple Retail Store and a Genius will help you transfer all your files from your old computer to your new one. If youd rather do it yourself, you can use a USB or FireWire hard drive or a local network to transfer photos, music, documents, and more.