Just a few days ago, Google Glass got a hefty update to XE12 with new Glassware, a new (official) wink gesture for taking photos, a lock screen, and other tweaks.
As expected, the Glass team has made the update's system image available for download from the Glass developers website.
The download table has also been given a fresh coat of paint with a new column dedicated to checksums. The update, which weighs in at 344MB can be downloaded by hitting the link below. It's worth noting that XE12 is the last update until February, so there's plenty of time to tinker.
Source: Glass Developers