If you've fallen out of love with your email client and want to try another service, TrueSwitch might be of interest. TrueSwitch automatically informs everyone in your contacts of your changed address, then forwards all of your email and contact data to your new account. Transfers between services partnering with TrueSwitch is free (Gmail, AOL and Outlook). For everyone else, a fairly reasonable $29.95. So, if you are one of the "90% of users [who] consider email interruption a barrier to switching to an ISP of their choice", procrastinate no longer.