According to this, Forgeworld/ Games Workshop will be releasing new airbrush paints, and an announcement will be coming forth soon in a Forgeworld Newsletter.
I don't have any additional information right now regarding the new airbrush paints, but it seems we will be seeing more very soon.
via a reader on Faeit 212
Just got an email back from Forgeworld regarding the new airbrush paints. I couldn't find any info about them online from the grand opening weekend, so I asked.
"Thanks for your email. The paints will be available world wide and come in the same kind of pot's as the weathering powders. They do come pre-thinned but of course you might want to thin them further depending on your airbrush, we will sell a thinner for this.
Keep an eye out on your newsletter for upcoming info!"