Rumor has it that the Mobile Me product and infrastructure as it currently stands is going into maintenance mode. I doubt Apple would give up entirely on something so important, so my best guess is that they are going to launch something entirely new that does many of the same things in a better way.
What Apple needs, and I imagine this is what it is working towards, is a way to make its gadget products (iPhone, iPad)"unethered" from a computer. In other words, you should be able to have an iPhone or an iPad and no computer. This is not currently the case. So I assume they are coming with some kind of cloud service that allows you to manage your backups, store the primary version of your information etc. directly from your device.
This is hearsay, so please treat it as such.