The thing that will really limit the potential of MobileMe is that the email address is not free. No one wants to sign-up for an email address that will go away if they ever decide to stop using the rest of the service. And, no one wants to pay full price for something if they're not going to use all the features. Make the email free (me.com is a pretty cool email) and people will start to whip out their annual Benjamins for the rest of the service!

Maybe Eddy Cue, the new head of MobileMe, reads HN. If so, you're welcome.