Taken from an email from Red Giant back in June of this year:
"You can go ahead and purchase the CS5 Suite upgrade for the Trapcode Suite. Knoll Light Factory, Datamator, Text Anarchy, Image Lounge, Composite Wizard are not yet updated for CS5. We are anticipating these updates to be available by the end of July."
I haven't purchased my upgrades yet since I'll be buying new hardware first, but I suspect they're all available by now.