From DCRP:
Olympus has released new firmware updates for their E-3 and E-510 digital SLRs, plus the 70-300 mm Zuiko lens. Here’s what you’ll get by installing the updates:
E-3 DSLR body:

Dial operation on the power grip HLD-4 has been improved. The relationship between the rotation of the dial and the movement [...]

Sony has released a firmware update for it’s Alpha A700 DSLR camera. Particulars are as follows:
This utility updates the DSLR-A700 Camera Firmware to version 3 and provides the following benefits:
Benefits over firmware version 2:

Resolves an issue where the Access Lamp remains lit and the camera stops responding when several pictures are taken in rapid [...]

Canon has posted a firmware update to the EOS 1Ds Mark III.

This firmware update (Version 1.0.6) incorporates the following improvements and fixes.
1. Improves the reliability of communication with some CF cards.
2. Fixes a phenomenon involving color cast and vertical lines appearing in images.

Head on over for the download.