Yea this is acctually the type of game I would like to see.
Something based on the "Gold Rush" series or the "Clondike" theme. {Did I spell that correctly}? Oh well. It's a great concept, and something I already suggested on another forum.
If it's done properly, with good graphics, it will take off like a rocket. {When it gets ported to Andriod for use on a smart phone, it would be even better}
Hope to see it on Facebook too ;-> Hope you do this game justice.