I am pleased to announce that support for the Xperia Z and Xperia ZL has been merged into official AOKP source a few hours back. A big Thank You goes to the FreeXperia Team who had done the initial hardware bringup of the devices.
Download links, support threads and all info for these new Xperias, as well as all other supported devices can be found on the devices page.
If all goes right these two, along with all the other devices, will get the 18 May nightly in some hours.
NOTE: For the Xperia Z and ZL, you are advised to stay on the 10.1.A.1.434 baseband or any baseband prior to that. 10.1.1.A.1.253 has a newer baseband that is NOT supported until notified so. Baseband 10.1.1.A.1.253 is supported from next batch of nightlies. Cheers!!