BarracudaBob pointed out on the forums that Citrix has updated their Tech Preview demo of Citrix Receiver for the BlackBerry PlayBook. It got a bump to v0.9.1 though no change log in sight. I know the Citrix Receiver support has been a key app for the PlayBook in the enterprise since it launched. On the other hand quite a few users are waiting impatiently for Citrix and RIM to add Citrix Gateway support (Their SSL VPN solution).
Check out v0.9.1 of Citrix Receiver in App World