Here's the link to the US release 8 firmware:
[Google Link]/data/ota/sony_beetle/f4a4825840de.PKG_REL08_NSZGS7_U2_2106_131390_20130406_URSC.zip

Official changelog:
Adds DLNA feature
Adds 3D video playback function
Adds "VUDU" application

New Packages:

VuduPlugin
CecManagerWrapper

changed ...