Google Chrome 9 build 9.0.570.0 has arrived for Dev channel. A number of updates lay the groundwork for features that'll be "coming soon." There's been a lot of work focused around Cloud Print.
Google Instant integration has also been tweaked, and a number of small UI issues have been touched up. The extension system received a lot of attention, with tweaks being made to both the filesystem and sidebar APIs.
More Info: Download