I came back from the convention with several new slot cards to trade. You can see them at these two addresses:
The blue lettering on the Harrahs cards is not on the card, but is a typed note to distinguish the varieties. Note that the maroon Rainbow Club is from Australia.
Will trade 1 for 1, or sell for $1 each if you don't have traders I need. The obsolete SPLASH card needs two traders or $2.