The Paranoid Android has released the first beta build of their AOSPA4+ ROM, based on Android 4.4 KitKat. Since this is the first release of the Paranoid Android ROM with the KitKat sources merged, a lot of features and enhancements are missing from it. 

This means that Halo, PIE and the Hybrid engine are missing from this release. The current feature list is pretty small and does not really feature anything special or unique.

The beta build is available for all the actively supported Nexus devices including the Galaxy Nexus, Nexus 4, Nexus 5, Nexus 7 (2012/2013) and the Nexus 10. The team will soon be releasing a build for the Oppo N1 as well.

The full feature-list as provided by the PA team is below -:

• Built-in SuperSu

• Advanced Power Menu

• Enhanced Volume Buttons

• Enhanced Volume Controls

• Global Immersive Mode Toggle

• Notification LED Light Controls

• Actionable Status Bar Date/Time

• Keyguard Quick Unlock [standard]

• Disable full screen keyboard [standard]

• Basic file browser (Documents <from Omni>)

• Exposed Google’s Native App Privacy Controls

• Recent/Clear All Button Combo (context aware)

• Screenshot Delete Added to Screenshot Notification

• Optional Lock Screen Transparency (blur effect WIP)

• Optional Status Bar Battery Icons (mirrored in quick settings)

• Quick Settings 2.0 (edit tiles from within the pull down panel)

It is always a matter of time before the PA team adds back all the features that they have been known for, with further tweaks and enhancements.

The Paranoid Android team does not support a variety of devices, and has always focused on adding unique features. If your device is not supported by the Paranoid Android team, there is a high probability that an unofficial build would be released for it by a developer.

The download link and flashing instructions can be found over here.