That's awesome. I found some pizza I had forgot about in the back of the fridge!! Looks like it's our lucky day
Only way to find out if it's good is to use it. I wouldn't dump a bunch of $ in hops in it or anything. Make a simple no frills wheat beer with some dry yeast. Dump a bunch of orange peel, a bit of coriander, and some Cascades in it and see what happens.