In case you missed it, the upgraded firmware for the Canon EOS–5D Mark II that was announced recently was made available yesterday. Version 2.0.3 of the firmware has been in development for a few months now and adds a 24p (24 frames per second) option for a more film–like output. The 30fps version has been tweaked to conform to industry standards, which is actually 29.97fps.
Audio recording is now at 48KHz, up from 44.1KHz, along with the option to manually adjust the recording level.
Here’s the download page for firmware v2.0.3, but be sure to check the upgrade instructions (PDF) beforehand.