The blog post elaborates on the spec icon at least, the big theme is gambling. Your Skritt pals will steal two random artifacts for you to pick from, and your new utility skill class can be recast while on cooldown, but with a risk of penalties to you.

I do think it's funny that Thief is getting this, while Mesmer is getting ~~bard~~ troubador, given Mesmer has "chaos sorcery"... which is not wild magic, but space, time, mind and sense magic.