Update: Dark_AleX is back with 4.01 M33 update #2. Download below.
Changes:

Nids resolver: Fixed scePowerGetCpuClockFrequency issue. This is the same bug that happened in 3.80 M33-1, it won’t happen again ¬¬
Fixes recovery problems that have apperared in prior version (incorrect position of back string in language others than english, enable, and disabled strings not translated in […]

The promised 1.50 kernel add-on for 4.01 M33 is here! This will allow you to run homebrew written for firmware 1.50.
Unfortunately, for PSP Slim users, this will only work with the original Phat PSP. To install, check the readme for instructions. In addition, you will need to download the official 1.50 firmware update, rename it […]

If you recently updated to custom firmware 3.95 GEN, then it’s time to update, again. Miriam and the devs bring us CFW 3.95 GEN update #2.
Changes:

Fixed issue which crashed the PSP if you had vshmenu mode ‘None’. (if you have a GEN-1 pseudo-brick, change the vshmenu mode to fix it)
Fixed SNES emulator issues, now […]

Miriam and the rest of the devs have released, as promised, the much anticipated 3.95 GEN custom firmware.
CFW 3.95 GEN Changes:

General

Kernel updated to 3.95 (new nids, patches etc.).

Recovery

Option added in recovery to choose between VSHMenu and in-XMB recovery.

Option added in recovery to choose between Sony, GEN and M33 network […]

Dark_AleX is back with custom firmware 3.90 M33-3 and Despertar del Cementerio version 5, the universal unbricker.
CFW 3.90 M33-3 Changes:

March33 noumd driver compatibiilty has increased to support games like Coded Arms, Patapon, Harvest Moon Innocent Life and probably others affected by same errors.

Despertar del Cementerio v5 Changes:

Now installs 3.90 M33-3 instead of 3.80 M33-5
Integration with […]

Dark_AleX is back again, this time with something brand new — TimeMachine v0.1.
The Timemachine is a program to load previous firmwares and custom firmwares from memory stick using pandora. Like devhook, but working throgh pandora and custom ipl’s, it would work even if the flash and nand ipl of the machine is destroyed.
The timemachine is […]

Update: Version 2 is now available for download:

Added to the installer the check of correct checksum of fatmsmod.prx. Use only encrypted or decrypted version of file.
Music, videos, etc now work.

Dark_AleX has released a new patch to load the FW 3.71 fatmsmod.prx on custom firmwares 3.80 and 3.90 M33.
The purpose of this patch is […]

Dark_AleX has released update #2 for his 3.90 M33 custom firmware.
Changes:

Improvements in plugins loading code:

Fixed some problems with problematic cards due to filesystem not mounted.
Now plugins should read the faster.
Problem fixed with lines with spaces at the end.

Added the rest of regions to the recovery option fakeregion.
(PSP SLIM): Added patches in nand ipl to […]

Dark_AleX has released version 2 of his 1.50 kernel addon for custom firmware 3.90 M33. Remember, this is for PSP Fat users only. Does not work with the Slim.
Changes:

TA086: when being in 4th brightness level and recovering from sleep mode, the display was black. Fixed.
Added support in the 1.50 kernel for memory sticks greater than […]

That was fast! Shortly after Sony releases firmware 3.90, Dark_AleX creates his custom version. This is especially important for PSP Slim users as they can get their hands on that new Skype functionality without losing homebrew capabilities.
3.80 M33 Changes:

3.80 -> 3.90
March33 NO UMD: fixed (yet another) bug related with exiting with home. (infinite semaphore […]