Android-x86.org has announced the 4.4-r1 release based on Android 4.4 KitKat

Key Features
The 4.4-r1 release is based on the Android 4.4.2 (KitKat-MR1 release). We have fixed and added x86 specified code to let the system runs smoothly on x86 platforms, especially for tablets and netbooks. The key features contain

Integrate the ffmpeg as the stagefright-plugins to support much more multimedia files. Now we can play HD and full HD videos in apps.
Use the latest longterm stable kernel 3.10.52 with more drivers enabled. Most netbooks can run Android-x86 in the native resolution.
OpenGL ES hardware acceleration for AMD Radeon and Intel chipsets (PowerVR chips are NOT supported).
Enhance the installer to support upgrade from previous versions (since ics-x86). The text based GUI installer supports ext3/ext2/ntfs/fat32 filesystems.
KitKat style lanucher (Trebuchet).
Support Multi-touch, Wifi, Audio, Bluetooth, G-sensor and Camera.
Support Huawei 3G modem.
Simulate sdcard by internal storage.
External usb drive and sdcard are auto mounted to /storage/usbX on plugging. Support filesystem vfat/ntfs/exfat/ext4.
Support hybrid mode of iso images.
Multi-user support (max 8).
Support Ethernet (DHCP only).
Support 5-point touch calibration on some devices.
Support VM like Qemu and VMware.

Released File
We tried to create a universal image for most x86 platforms for the kitkat-x86 release. The plan is still in an experimental stage. Please report bugs to the android-x86 forum with detailed specs of your machine and error logs.

android-x86-4.4-r1.iso

sha1sum: dce96b2ff7e81cc7c2a884f6028f114ca3133c20

The iso file is hybrid format. That means you can dump the iso into a usb drive and get a bootable usb stick, like
$ dd if=android-x86-4.4-r1.iso of=/dev/sdX

where /dev/sdX is the device name of your usb drive.

Known issues

Suspend and resume may not work on some systems.
The installer can't format ext3 filesystem.

Source code

The source code is available in the main git server,

    $ repo init -u  http://git.android-x86.org/manifest -b kitkat-x86
    $ repo sync 

  Android-x86 4.4-r1 released