Now available for download, the new update doesn't seem to do much. It fixed a problem with Dream Club Portable for Japanese users yesterday. 1.67 is 94Mb big and will take a few minutes of your life to achieve absolutely nothing. I do hate it when any company does these noddy updates.
The last update had few unlisted benefits, so we'll wait and see if eager users find any additional benefits before firmly tagging this under "waste of space." Just in case Sony has forgotten, the list of things it needs to fix is:
PS One game support
PS3-Vita Online ID equalisation
PS2 Support (the hardware can clearly do it, so come on Sony!)
TV out (I'll happily buy a lead or HDWiFi dongle)
Anything else you can think of?