what this means is we can now do two things.
1) we are now able to create and sign .SBF files so we can push our own recovery, kernel, bootloader.
2) using mathematica the droid 2 key can be calculated, this allows the devs to include files that will pass the security encryption of the bootloader.
Fancy talk of the breakdown
Boot chain component Status
OMAP secure bootrom secure
Secure keystore replaceable (this CG must be signed by motorola's key)
mbmloader secure, but irrelevant
mbm secure, but irrelevant, replaceable but unnecessary
recovery replaceable (signable by anything in keystore)
system replaceable (signable by anything in keystore)
bootimage replaceable (signable by anything in keystore)
Overall we will probably see some great things come down the pipe for the Droid X here shortly and The Droid 2 community will piggyback behind them. So we'll be able to start forcing gingerbread to our phone far sooner than motorola will get it out to us. And we will be able to truely make Blurless ROMs and not just visually blurless ROMs. Plus CyanogenMod will likely get an official port.