On the Kindle source code page two new packages recently appeared:
Some users have already reported receiving these updates on your devices. Manual Kindle software update URL still returns 2.0.3 for me and there is no known URL to check for Kindle DX updates at the moment. There doesn’t seem to be any update for the original 1st generation Kindle at the moment.
If you notice any differences after your Kindle updates, please let me know. This would also be a good time to temporarily revert Unicode Font Hack or any other firmware-altering hacks that you have installed so that automated update installation will not fail. You can safely reapply hacks after you get the updates.