[eschwartz]

1. Amazon is finally updating to 21st century crypto on their website and they need to make sure all older devices can still access Amazon's servers to download books.
   It is currently unclear that applies only to the earlier non-touch devices or not. There have been sporadic patches for SSL, etc. to the K3/K4NT/K1, maybe they just want to make sure everyone is up-to-date.
   But the K2/DX(G) has reportedly downloaded a non-published update which does some stuff too.
   If you want more details, why don't you tell us what your current firmware for each device is?
   
2. The jailbreak will survive on the KT.
   For the PW1 you must make sure you are running the latest version of the jailbreak (1.13.N) and start using MrPI (MobileRead Package Installer) to install hacks.
   (But it doesn't actually hurt to update the jailbreak on your KT as well, and MrPI is just faster anyway. )
   
3. The font hack is available on the latest firmwares, but JBPatch is firmware-specific and only works on the firmwares specified in the JBPatch thread.
   It hasn't been updated for the latest firmware (Ixtab gave up on fighting each new firmware) so I can tell you right now it won't work anymore although kaznelson has a minimal margins hack for the PW and there are instructions for building it for any firmware.
   
4. KUAL + BackDoorLock should work on your current firmware, as it depends on the firmware you are running rather than the update you are trying to block.