I found this at a nursery... nobody there knows what it is. Any help would be greatly appreciated.
Here is a link that might be useful:
Hmmm... the leaf shape looks familiar...
Looks like a variegated Abutilon (house maple)
Or perhaps a variegated Poinsettia?
Randy, my first thought is Sapium salicifolium. I also think variegated Euphorbia pulcherrima is a possibility. Crack a piece of one of the less showy leaves and see if it has milky sap.
I got a positive ID from the House Plant Forum... it's a Alternanthera ficoidea "Party Time".