Warming it back up breaks the pasta down quite a bit though after being frozen. Could you recycle it with some meat or something and make a new dish to use it with? It will stay good for 6 days in the fridge.
I've frozen baked macaroni and cheese successfully. Just be sure to thaw in the refrigerator and allow plenty of time so it is completely thawed before you reheat it. Also, reheat slowly so it will so it has time to heat through without stirring.
I'm with Kaylinda on this, after thawing, the pasta will break down and become mushy. I dont think baking or microwaving will do any good, but it's still edible.
About freezing, one of my favorite stories about freezing food is from a food segment on the news years ago. About 22 years ago Joe Carccione, the Green Grocer (I loved him, even though he said "vege-tebble"!) was asked if you can freeze lettuce. His answer was that yes, of course you can freeze lettuce. It just doesn't defrost worth anything!