This article seems to skip on one of the most important aspects of Ubuntu One for me: syncing my /Home folder. I've been keeping my photos/documents synced across platforms for years with Dropbox. Ubuntu Ones service is significantly slower at this procedure... BUT, Dropbox doesn't give me the flexibility to sync my config files (or if it does, I have no idea how.) Keeping my config files synced is immeasurably more…
Couldn't you just store your config files in Dropbox and make symlinks? For example, my .vimrc is a symlink to Dropbox/.vimrc
Sure, but then I have to rebuild those symlinks after install... now, I don't do installs every 30 days like some Linux users, but I do upgrade with each new release and having stuff "just work" is just simply beautiful.