I have some photography travel coming up in a few months and I have started to look at security solutions for my camera and computer gear. After a quick search I found the very affordable Voltage Valet Cable Alarm.
This slightly bulky device allows you to lock anything that will fit around the adjustable cable and will either alarm on a cut cable or if the object is moved. I plan on using the lock in the hotel room as well as on the go when stopping for food, or when I just need to set my bag down.
I got my off of eBay for $9.95 with free shipping which seems to be the going rate (Amazon http://www.amazon.com/Voltage-Valet-Cable-Lock-Alarm/dp/B004BAGPCC)
So far the device seems to work as promised but I have not used it long enough to list the pros and cons.