mobile router is best solution for people those who require wireless LAN on their move, Internet connection, and a backup connection for their wired (DSL or cable modem) Internet access.
I personally prefer a light devices that have elegant design and it should have some additional slots that brings the mobile data to my network especially when I am on traveling, even I won't mind paying some extra for robust firewall and encryption for security purpose.
freeasthewind
Sounds good to me. Since I love my laptop