3.90 M33-2 changes:

• Improvements in plugins loading code:
  • Fixed some problems with problematic cards due to file system not mounted.
  • Now plugins should read faster.
  • Problem fixed with lines with spaces at the end.
• Added the rest of regions to the recovery option fake region.
• (PSP SLIM): Added patches in nand ipl to allow Booster multiiplloader and TimeMachine iplloader to boot from nand.
• Note: only 3.90 M33-2 and higher can be booted from nand in slim with those ipl loaders, not official Sony firmwares or previous versions of M33.

Changes in updater:

• The 3.90 eboot downloading code is now more stable, no more freezes after selecting AP
• Memory stick write in the 3.90 downloading code is delayed the maximum possible for faster operation (the system prefers big chunks of data written at once).

if you didnt notice there is mention of "TimeMachine" this app will be able to allow slim users to run homebrew on the 1.50 kernel, this is not out yet

but with this mention im guessing it will be here soon.