YoVille is giving away two Gold Mystery Boxes this week only

As Platinum Ninja told us before, September marks YoVille's Player Appreciation Month. And to kick off the festivities, Zynga will be randomly giving away Gold Mystery Boxes twice this week, but they're not telling when.

You'll have to log in to the game daily (a chore, we know) to find out exactly when these mysterious goodies will be given away. Obviously, the contents of the boxes are a mystery, but expect lots of coins and YoCash to fill those wallets again after the Labor Day Sale, according to the YoVille blog.

When looking at the success of Zynga's other social games, it's a surprise we haven't seen similar events in FarmVille, Mafia Wars or FrontierVille. Here's to hoping this is the start of a new trend for Zynga!