[Pockets69]

Guys decided to post this here as nobody seemed to care about it, and it's way too important for the xbox 360 scene and no one should miss it.

"Ikari360 released a new version of freeBOOT. This new version of the 'rebooter' will launch right into a patched version the latest MS dash (8955) and will now also work on Zephyr and Jasper-16mb motherboards (next to the original support for Xenon and Falcon).
But the even bigger news in this v0.02 is that the kernel is patched! No more XEX signature checks, LIVE/PIRS signature checks and Harddisk authentication ... which basically makes homebrew XDK possible on retail Xbox 360! And this should also allow you to patch existing signed XEXs with any (region, media etc) flags you want.

freeBOOT must be installed on a 2nd 'NAND' ... but next to Cygnos360 v2 support, it will now also work with Cygnos360 v1 and the (homebrew) xD-card mod!
But of course, this still requires the JTAG hack, so it's only possible on (pre ~June 2009) Xbox360 consoles where the onboard NAND has never been updated (via any normal MS procedure) to 849x (July 09) or newer. If you updated to anything over 7371, your 2BL (bootloader) has been updated (which won't allow a non paired image to boot into 4548) and CB-fuse inside the CPU burned, so the JTAG hack won't work anymore and there's no way to downgrade for now.
However if you're still on 7371 (or anything lower), you can now 'reboot' that console into a patched 8955. Your onboard NAND stays untouched on 7371 and freeBOOT/XeLL/patched-8955 are located on the 2nd NAND. The fuses are no problem either as freeBOOT will use 'virtual fuses' to launch 8955.
For new systems and refurbs things can be a bit more complicated, some still have 7363/7371 or lower but already have the new bootloader that fixed the JTAG hack, I dont think there's a way to know for sure without first dumping your NAND and check your CB-version. For new systems, certainly try to get one produced before June 2009.
It's called a 'rebooter' because it uses the JTAG hack to boot your console into XeLL and from there it 'reboots' your console into the patched 8955 kernel."
Credit Xbox-scene.com

There you go guys really important news in the xbox 360 scene.