The crowdfunding campaign for the Jolla tablet has been launched in the past few hours, and is already 100% beyond its funding goal. In a nutshell, it's an open source OS based on Linux that is also capable of running Android applications. It has some similar specs to an iPad mini and is shipping in May 2015 for around $220.

https://www.indiegogo.com/projects/jolla-tablet-world-s-first-crowdsourced-tablet#activity

For those not familiar with Jolla and Sailfish: http://jolla.com/tablet

Australia is not included in the countries for shipping, but is the highest voted for in the poll for which countries to add.