I've traveled a few times this year (domestically) with all of the following--

* company laptop (was a Lenovo Thinkpad 15")
* Apple MacBook Air 11"
* Kindle
* iPhone
* work Blackberry

The first time I did it with both computers, I didn't know to put them in separate bins, and of the TSA person was a bit snarky about it. But I've learned from that experience.

Same is going on with my work, when I travel I try to avoid doing too much personal stuff on the work laptop. The MacBook Air makes a great add-on, since it isn't too heavy.

After doing this a couple of times though, my backpack/laptop bag was pretty heavy. Conveniently timed, a month ago I had to get a new work computer (every 3 years), and I selected the 12.5" Thinkpad. What a world of difference in weight -v- the 15" ^