I would also suggest the Apple Airport Express (same size/functionality as the Linksys box).
Apple - AirPort Express
I travel with one in my laptop case, all over the world. At worst, I don't have to sit at the little desks that the hotel provides because I can move about the room. At best, I have used it in trade shows and other Cable-only settings where I need to share that wire with others (work or family). This little box handles up to 10 connections.
Cheers!