Here's a clue for the MobileMe team:
http://explore.live.com/windows-live-mesh?os=other&wa=wsignin1.0
Windows Live Mesh.
I use MS word out of convenience, I think that's why most people use it.
I write documents and often need to access them from other computers, this is easy if I remember to place those documents into iDisk. Then I've got them anywhere, decent feature if you remember to sync every new Doc.
Windows Live Mesh gives me 5GB of cloud space to replicate my entire Documents folder online. Even if I forget to sync it doesn't matter because Windows Live Mesh keeps my entire Documents folder sync'd online. I am never without a document, even if it's one from a while ago that I didn't intent to use but remembered as it was relevant to the situation.
Here's what I want from MobileMe:
When I first save a Document I want MobileMe to ask me whether or not I want that Document sync'd to MobileMe. Every time that Document is modified from there on out I want it sync'd with the MobileMe version so that it is always available to me.
Like Windows Live Mesh I would like Apple to provide at least 5GB of cloud space for 'whatever I want.' If I want that cloud space syncing my documents folder, so be it. If someone has a folder with 5GB of pictures they want on permanent then so be it. Hell, it could be a folder with 5GB of anything as long as it reliable syncs and would be available anywhere.
I would like MobileMe to provide seamless integration between my iMac, my MacBook Pro, and my iPhone. Anything changed in the Sync folder will be immediately updated on the devices I am not using at the time.
The key being 'seamless.'