So, you want to move your MobileMe account to iCloud.
First, read this frequently asked questions about the MobileMe transition and iCloud.
What you need to have is at least one of the followings:
- A Macintosh running OS X Lion 10.7.2
- An iPhone, iPod touch or iPad running iOS 5.
From iCloud page at Apple.com:
iCloud requires iOS 5 on iPhone 3GS or later, iPod touch (3rd and 4th generation), iPad, or iPad 2; a Mac computer with OS X Lion; or a PC with Windows Vista or Windows 7 (Outlook 2007 or 2010 required for accessing contacts and calendars). Some features require a Wi-Fi connection. Some features are not available in all countries. Access to some services is limited to 10 devices
Whenever you are ready, head to http://me.com/move/ and login to your MobileMe account. Follow the instructions. Once the transition completed, you can then login to iCloud.