Great news. I'll try it out next week, I'm just finishing jumping and movement in my platformer, so it's great time to add animations.
I'll try to also support you on kickstarter because the price is really nice.
PS. I see you also have UI animation in examples now... I wonder if it will be posibble to do a complex animation in Spine with several heroes walking on an animated background - I'm gonna be making such animation sooner or later (as a intro) or is it better to make parts in Spine and compile it in libGDX later?