The current beta iOS 5.0 versions have settings that imply the ability to purchase memory increases in iCloud from the free default 5GB. I suspect Apple wanted the keynote and media coverage to focus on the fact all of iCloud is free and 5GB is plenty without having an asterisk that you can buy more memory. These details are sure to come out as we approach the launch of iCloud, likely in late September, and perhaps MobileMe features like Galleries, iWeb hosting etc. will be "inexpensive" upgrades to the core free functionality of iCloud. We will see. Personally I think iDisk is dead, as is iWeb hosting. I think Galleries might have a chance.