LiveCD's are GREAT for recovery and as an installation media .. not so good (as a LiveUSB with persistence) in the "test drive" role.
And yeah, there's also the netbook/no optical drive issue

On other PC's I've obviously had the "the PC won't boot from LiveUSB/removable media at all" issue .. but only (so far) on the AA1 have I had the issue where it will boot "some" sticks but not others, seeing some as FDD's and others as HDD's .. it's just odd like that

But that's just the crazy a** world of computers we live in.....
