There's nothing majorly wrong with Apple's MobileMe service. All of its subsidiary pieces and parts—the email, the syncable calendar and contacts, the photo gallery, the online storage—do fine. So why doesn't it make sense?
Apple has every right to be proud of the fact that it got its act together, and everything that was all herky jerky back in July 2008, when the $99-per-year MobileMe launched, is now working as billed. The push email shows up immediately, if you use your me.com account. Ditto for the push contacts and the push calendar, though you can't use web cals like Google's or Yahoo's if you want to be super synced. The gallery works great; as a dad I upload tons of pictures and videos to the MobileMe gallery right from iPhoto, but with iPhoto '09, I can upload them to my free accounts at Facebook and Flickr too. There's even iDisk, a smoothly integrated 20GB cloud storage service, which now has a public drop box for file sharing, just like YouSendIt. And if you have a time capsule NAS/wireless access point, you can remotely access your disk using mobile me, as well as use back to my mac remote desktop control. (The service tracks the dynamic IPs of all your machines, so each machine can always keep track of the others.)