Just released a game using the Spine XNA runtime on XBox Live Indie Games. The game is titled 'Stop the XOID!'
It was inspired by my 5/yo son who wanted to call it 'Stop the Droid!' but was changed to the current title to avoid the wrath of Lucas Arts
Anyway, it was a great experience, and I loved using Spine. It made my workflow so much easier and animation is so much fun!
I will be working on the PC version now which will have many more weapons, upgrades, maps and PvP maps too.