The PSP® system software version 3.95 (with 3.90 / 3.93) update includes the following:
Game
Playing PlayStation® format software
New for 3.95: A new option for playing PlayStation® format software has been added. You can now select [Custom] for the assignment pattern under [Assign Buttons]. > See details.
Network
Quitting remote play
New for 3.95: You can now choose either [Quit and Turn Off the PS3™ System] or [Quit Without Turning Off the PS3™ System] after you select [Quit Remote Play]. > See details
Skype
New for 3.93: (Skype™) has been added as a feature under [Network]. > See details.
Other new or revised features in version 3.95 (with 3.90 / 3.93):
Game
Internet Radio
- New for 3.93: Support for PLAYSTATION®Network titles has been expanded.
New players for (Internet Radio) are now available.* For details, see Internet Radio.
*This feature expansion is not related to the version 3.93/3.95 updates. You can use the additional Internet radio players with system software 3.80 or later.
So, I guess we can expect the custom firmware approx. the same time.