GWT for Chrome extensions?

Google I/O 2009 opened today. While I wasn't able to attend this year's event, I have been watching for interesting developments. The first I've seen is this post on the Chromium Blog. Google's plan is for extensions to the Chrome browser to be web pages written in HTML, JavaScript, and CSS. Chrome will provide a JavaScript API for extensions and Google will provide a service for extension hosting, discovery, and automatic updates. How long before we see a GWT wrapper for the Chrome extension API?