I've just gone through the same discovery - the main use for documents in the cloud IMO is to start work on a document on your desktop, have access to it to modify it while on the road and then finish it off when you get back to your desktop.
I can do that with MobileMe iDisk without any hassle, but not currently with iCloud: It doesn't make any sense to me at all.
I just hope there's a new iWork coming very soon!