This thread looks like a great opportunity to learn what each of us takes when traveling, especially abroad/by air. (I always take my 60D, lenses, flash, tripod etc when going by car, although I very seldom shoot other than handheld with available light. On a recent trip to Czech republic, a good P&S might have sufficed for 90+% of the photos I took.)
I'm considering buying myself a Fuji X20 for traveling light and leaving the 60D at home, for I've realized (1) most shots when traveling concern the background, even if it's a portrait, so there's no need for very shallow DoF, and (2) I'm too lazy to carry heavy gear I won't probably use/benefit of.
The X100s is another camera I consider, although I'm not sure I'll be comfortable with a fixed lens, despite all its advantages.
The EOS M would be perfect to stick with the brand and be able to use accessories (e.g., flash and lenses), but from what I've read it's not that great a camera; also, I'd rather have a VF, and even though it's small, I don't see it fitting in a pocket with a lens attached (same "problem" with the seemingly terrific Olympus OM-D EM-5).
What do you take nowadays, and what are you thinking of buying? Why is that?