They were recently enabled by default in the Chromium builds. Lots of features are still missing (all of the interface/toolbar stuff only works in Windows right

They were recently enabled by default in the Chromium builds. Lots of features are still missing (all of the interface/toolbar stuff only works in Windows right now, for example, and installed extensions are purged with every restart of the browser on OS X/Linux). The extension API is lightweight and fantastic though, so I'm with you in hoping that they get make it into Chrome sooner rather than later.