Chrome OS beta channel has been updated to 0.9.130.14. For the first time, Google has provided full details about the update on their blog. For most users, the most welcome part of the update will certainly be the audio issue fix, no more static! Also, the issues with certain WPA and WPA2 networks that use TKIP encryption has been resolved, if you've experienced slow WiFi speeds, this bug might have been the culprit.
As always, feel free to share your upgrade experience in the comments