the changelog is here: http://www.mele.cn/download/show/21.htm
Here are the modified versions:
Phoenixcard image: Mele_HTPC_20130116_V1.3.1_en_US_Apex.img
dd-able img: Mele_HTPC_20130116_V1.3.1_en_US_Apex.ddimg.bz2
sdcard version: <TBD>
To get google apps, from the installed Mele firmware, use the Internet navigator and download this:
This will put the file in /mnt/sdcard/Download/, where the init script looks at.
Reboot, wait for the device to reboot and you are done.
Original firmware: http://www.mele.cn/download/show/21.htm
I applied the same things as in my previous post:
Mele_HTPC_20121220_V1.3 en_US img+sdcard version