The 3.1 PTR has finally dropped and below is a current list of DK changes and then further below that will be the rest of the patch notes. You can see all of the class changes over at MMOC

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3.1 PTR Patch Notes

More blue info was leaked tonight about an upcoming event on the PTR, The Argent Tournament, will be tested once the PTR is up (if ever!). Below is the info: Zarhym In patch 3.1, a new world event titled “The Argent Tournament” will be coming to Northrend! This tournament will be live on the 3.1 PTR and open for testing, though certain aspects are still in development. Players will find a host of new features here, including: The ability to prove your worth to a capital city of your choosing through our new mounted combat system (still in development) New daily quests to construct the great Argent Crusade coliseum for glorious battles to come All new rewards – new items, titles, banners, tabards, pets, mounts, and more All new achievements Many more festivities, and more to come in future content updates! Players will find the Argent Tournament in Icecrown.

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More 3.1 PTR Info: The Argent Tournament