MacNN reports that Silicon Grail's website has been updated to reflect Apple's purchase of that company.
As previously reported, Silicon Grail publishes Rayz:
RAYZ is a completely new compositing product, written from scratch by Silicon Grails Academy Award winning development team.
RAYZ facilitates the smooth and easy set up of shots. The customizable interface conforms quickly to individual working styles, and permits a very quick test-and-edit shot development cycle.
Apple had acquired Nothing Real in Feb, 2002 - a company with similar products.