Macally's low-priced iKey30 iPad keyboard foregoes a Bluetooth connection in favor of a dock-connector cable. This is in some ways less convenient than a wireless connection, but it has its own advantages.
Quoted from Review: iKey30 wired iPad keyboard offers unique features on ipad 3 features – Yahoo! News Search Results
Your office can be anywhere with an AlphaSmart! 4.) Use your smart phone for communicating. This may sound antithetical to some, but hear me out.