I'd love to be able to collect little plush toys of the Gnomes and helpers. These could be manufactured for relatively cheap. Put them up for sale on the Playdom website.
Honestly, I'd be more apt to buying those and having something tangible from the game.
And there could be a deal for Snookers. Buy the whole lot of helpers and get Snookers for free.
I know there is merchandise for some of the other games. How about it for Gnome Town?