So, let me interject a bit on the ergonomics issue of chiclet and super thin keyboards...
I don't know if it was by design or by accident, but super thin keyboards actually may be more ergonomic for your average user because your average user doesn't buy wrist rests, keyboard trays, computer tables, or computer chairs. They've got a computer on top of an old desk somewhere and they're probably sitting on a wooden chair or an old office chair that's too short for comfortable computer use.
For these people, a flat keyboard is an asset because they're either going be to resting their forearms on the table top or the keyboard will be on the edge of the table and a regularly sized keyboard with normal travel will cause them to have to arch their wrists back into a really bad position for typing.
If you're trying to use a wrist or palm rest with these keyboards then they'll be impossible to use, but wrist or palm rests themselves are not necessarily recommended ergonomic devices. They help some people correct or prevent bad habits, but they can also create discomfort and lead to problems as well.
For a travel situation in which your computing setup may end up looking very similar to the daily setup of the average user because you're just using whatever furniture is available in front of you, a super flat keyboard may be a much better idea than you think... you just have to get used to it. If you're any good of a typist, you will pretty quickly once you get over how strange it feels at first.
