There's always a lot of talk here about use of mobile devices, android, ipad, etc for navigation and other sailing functions. How about this? Looks pretty neat.
Earl - Backcountry Survival Tablet
Earl: World’s First Solar-Powered Backcountry Survival Tablet - ABC News
Pros: e-ink sunlight readable, ruggedized, android-based, low cost
Cons: It's not real yet, (but their kickstarter campaign is getting lots of attention now)