I dont know why you would travel with your (wired) Apple “Thin” Keyboard, but if you do, you might want to look at the WaterField sleeve for it ($39 USD). The outer-shell is water-resistant and the inside is nicely padded. Obviously it comes in different colors to match your bags or T-shirt. There is a version for the wireless keyboard too ($37 USD) – I guess that it is going to be the more successful one.
sooo now, keyboard also having sleeve, looks great, and nice design and colors,,,