How to switch to GMail from Yahoo Mail or Hotmail

Switching to a new email address can be a pain, but it doesn't have to be. To get personalized help on how to switch to Gmail, visit the new Switch to GMail guide. You will learn how to import contacts into GMail and how to announce your new GMail address.

Some other nice links:

Hotmail

Switch from Hotmail
Invite your Hotmail contacts
Inform you friends that you've switched

Yahoo Mail

Switch from Yahoo
Invite your Yahoo Mail contacts
Inform you friends that you've switched