I received an email today from them saying :
ControlTL Firmware Updates
3.0 for Nikon and 6.0 for Canon
PowerST4 firmware update 5.1
You are receiving this e-mail because you signed up to receive e-mail notification when new firmware updates are available for PocketWizard products. We've released a major firmware upgrade for the MiniTT1 and FlexTT5 for both Canon and Nikon as well as the PowerST4 for Elinchrom. New features include HyperSync™ Automation, SpeedCycler with an AC3 ZoneController and Flash Power without a camera. Additionally, many improvements have been made to the firmware which affect a variety of cameras and flashes
Better late than never, they're obviously just a little slow at sending them out.