Many new games are supposed to be working with CrossOver Games 9.0, but the big feature for CodeWeavers in particular is compatibility with Valve's new 2010 Steam client for Windows, which we just talked about a few minutes ago. CrossOver Games 8.0 does not work with this Steam update, but for the past few weeks while beta testing the Steam Windows update, CodeWeavers has managed to get it running with their newest 9.0 code-base.
CodeWeavers for now is just recommending those who want to use the new Steam client upgrade against the CrossOver Games 9.0 Beta release. "However, we really haven't had much time to test it or shake out any problems. So we really recommend it only for customers that need to use the new Steam GUI."
Beyond that, Jeremy White, the founder and CEO of CodeWeavers, has been scarce on details concerning this 9.0 update. His blog post announcing the beta can be read on this web-page. Hopefully soon though the need to run Steam under Wine / CrossOver Games will become obsolete.