And as a note, the vast majority of menu items on the menus at participating restaurants are available for DDP. There are only a very few items which may require an additional charge (and usually it's about $2). One of these is the feasts at Marrakesh. The Kitchen Sink (hm, I typoed "sick" in there... slip perhaps

) is also not available for credits as a dessert.
Along with the official menus and the WDWInfo menus,
www.AllEars.net has an acceptable format and are updated pretty decently.
Last thing, you'll notice on the 2012 DDP brochures that the restaurant lists are far less than 2011, don't let that worry you. There's a very good chance that the full 2011 list will make it to the 2012 plans by the end of the year, just the non-Disney owned restaurants have until then to sign next year's contract. In the history of the DDP, only Fulton's has ever dropped from accepting the plan.
You may use it as many times as you would like during the lenght of your stay. (or depending on who you ask, even future visits to the world, but that is a whole other topic for another day...lol)
As for this, the official policy is length of stay, whether or not you can "get away" with going outside that policy is something best left for another day, but the official policy of Disney (and thereby these boards, as we go by the rules) is length of stay only.
(I know you weren't trying to start anything

, just wanted to make sure the message was clear).