Casual games company Zynga have just announced that they will donate a chunk of money to support emergency aid in Haiti, if you buy certain things in their uber-popular Facebook games.

Now – if you’re on Facebook, chances are your news feed is clogged by details about your cousin buying a cow in FarmVille, your neighbour finishing a ‘job’ in Mafia Wars or your old mate from high school winning big in Zynga Poker.

It’s those three games that will help contribute to the World Food Program’s effort in earthquake-stricken Haiti, through the purchase of special limited-edition in-game items.

Before you say that it won’t make a difference, Zynga gamers have already contributed US$1.2 million to the aid effort.

Zynga CEO Mark Pincus explains:

“The devastation in Haiti is unimaginable, and anything we or our users can do is tiny compared to the utter loss for this nation.”

So – next time you log in to Zynga Poker, check out the special chip package and rare premium item; Mafia Wars users, make sure you pick up the Haitian drum, and I’ll be checking out the non-withering white corn on offer in FarmVille.

PS: If you’re into that social networking stuff, don’t forget to add playerattack on Facebook, or maybe follow @playerattack on Twitter!