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Homebrew developer becus25 just came up with a new build for his custom firmware bringing it up to version 3.40 IE. This project has really come along way and if we may add, there's a high possibility that the future of the homebrew scene lies on it since we all know what happened to DAX.
3.40 IE is an expansion for OE and here's the complete changelog for this build as provided by becus25 himself:
* You have two recoverys * On the second recovery (of IE), you can change the speed of CPU, the acces by USB for ms0, flash0/1/2. * Also you can enable a other autoboot located on "pspgamebooteboot.pbp" and do more things of the recovery of OE
On a last note, becus25 mentioned that to use the recovery of IE, you have to enable the autoboot option from the recovery of OE. Turn off your PlayStation Portable unit, turn it on then press the start button to execute the recovery of IE.