Apple's iPad was hardly the first tablet to appear on the scene, but it is unquestionably responsible for the recent spike in tablet development. Now it looks as if Ubuntu — the Linux distro everybody loves to hate, but uses anyway — will be entering the field as well.Canonical — the sponsor-company of Ubuntu and a number of other projects — revealed last week that development on a tablet version of Ubuntu is underway, which will be merged with its existing netbook edition to form Ubuntu Light. An existing version with that designation will presumably be renamed, integrated, or dropped altogether.