My newest creation for the Unity Asset Store has just been accepted and is available from now. I'm so happy about this! Check it out if you want to, or check out the related forum thread. Also stay tuned for some tutorial videos, which will follow asap (within a few days, hopefully). VertPaint will be up for sale on the Glitched Polygons store too.
This has been one hell of a ride, but I'm so glad everything worked out just fine. Have a great time everybody!