Here is an Android 4.4.2 KitKat rooted firmware for the new PIPO M8HD tablet. This firmware is based on an update dated 2014/02/19. 

( 1009-20140219-update４.４.zip )

Build information:

Kernel: Linux version 3.0.36+ (root@alex-System-Product-Name) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #202 SMP PREEMPT Wed Feb 19 18:31:31 CST 2014

Android 4.4.2 KitKat: rockchip/rk3188/rk3188:4.4.2/KOT49H/eng.root.20140219.183141:eng/opinions-on-teclast-p90hdst-keys

ro.rksdk.version=RK30_ANDROID$(PLATFORM_VERSION)-SDK-v1.00.00

Custom firmware features:

• root with latest SuperSU version 1.93 (free version)
• removed most Chinese and unnecessary applications
• Google Play Store fixes so more application are visible/compatible
• updated busybox v1.21.0.git (2012-11-29)
• Unix like init.d boot scripts support, more details on init.d scripts here
• changed permissions on external sdcard to allow write access
• increased space for applications (/data partition) to 4 GB
• disabled OTA updates (may cause problems, see Notes below)
• added Google Experience Launcher (GEL) in addition to PiPO's stock launcher
• use optional package to fix broken apps (Contacts/People and Calendar sync)
• temporary fix for multi-user support, thanks to didierm
• kernel modules (cifs, tun, lan, serial, xpad) compiled by Oma & Crew RKTablets, thank guys!
• optional ClockworkMod (CWM) Recovery easy install package 

Notes: 

- any update received thru OTA may interfere with our custom firmware, we recommend not to apply any OTA update

- current KitKat based firmwares should be considered as beta software

Download: kasty-pipo-m8_hd-442-20140219-rooted4.zip

Flash with Rockchip Batch Tool version 1.7, use Restore button.

Please report any problem with this firmware, I can't verify this custom firmware works as I don't have a PIPO M8HD tablet to test the custom firmware.