One more contest- open only for US though
but the prizes are hmm okay. The catch is you have to use the software Tableau created 
not R or J or ggobi or ggplot or java

Check out http://www.tableausoftware.com/public/biz-viz-contest/?=decisionstats

Tableau Interactive “Viz” Contest

AS FEATURED AT

Win a trip to Vegas and a chance for $2,000 & an iPad2

Are you a business, finance or real estate geek? This contest is for you! In cooperation with The Economist Ideas Economy conference, the Tableau Software Interactive “Viz” Contest will focus on business, finance and real estate data… Find some data then use Tableau Public to analyze and visualize it. That’s all it takes.

What you’ll win

A 3-day trip to Las Vegas and a chance to win $2,000 & an iPad2

The winner chosen by our judges will also take away a free roundtrip ticket to attend the2011 Tableau Customer Conference. This includes 3 night’s accommodations at theEncore and a chance to compete in the Iron Viz championship with the winners of two other contests. The winner of Iron Viz will take away a new iPad2, and $2,000.

Cash for the crowd favorite

After entering you’ll receive a custom bit.ly link to your viz. Tweet, Facebook and e-mail that link to everyone you can! Whoever gets the most clicks through their link will become our Crowd Favorite and receive a $250 debit card.

Recognition from The Economist Ideas Economy

Your winning entry will be announced live on stage at The Economist Ideas Economy conference, and Tableau will issue a national press release naming the winner.

Everyone who enters gets a t-shirt!

Everyone who enters will get a very cool Tableau t-shirt. The winner will also receive increased Tableau Public limits and a free copy of Tableau Desktop (a $1999 value)!

How it works

(Click on the steps to expand and get the details.)
 Check the box to view all steps and details.

• Step 1

  Download the FREE Tableau Public tool

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  Step 2

  Create and publish your “viz” to your blog or website

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  Step 3

  Submit your entry formFill out the entry form and submit by June 3, 2011. A panel of judges will evaluate all submissions based on overall appeal, design elements, and data analysis/findings.