(Answer) (Category) Digital Photography FAQ's : (Category) Canon EOS-300D / Digital Rebel / KISS Digital FAQ :
What is the latest firmware?
The firmware is currently at 1.0.2.
marius
10/23/2003: Canon has released firmware version 1.1.1 for the 300D/Digital Rebel. The announced features include more reliable PTP mode communications via USB and more reliable interfacing with RemoteCapture.

The firmware can be downloaded at http://www.canon.co.jp/Imaging/eosdigital/E3kr_firmware-e.html, and requires a 300D/Digital Rebel with Firmware 1.0.2 and a freshly formatted CF card to perform the upgrade.
marius

There is underway several attempts to modify the firmware of the 300D with varying degrees of success. Canon has not officially stated a position on this, though I'm certain I know how they feel and therefore I will not provide more information here than saying such efforts exist. :)
marius
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