Last night I was given an ultra-uber-top-secret image with multitouch enabled to beta test. I have been running it most of the day and so far the only bugs I have found were bugs that have been proved to already exist in the browser but were not as noticeable when you rarely use zoom. Overall it seems like multitouch is going to succeed on the G1. I have tested many sites and all seem to zoom fine. The main bug occurs when you zoom into a page and then transition to a page that does not allow zoom. This causes the unzoomable page to be zoomed in but unable to be zoomed out. Pinching and (spreading?) works great and is a much more natural method of making pages larger. Maps multitouch zooming is in the works and might not be available by the first release but we will see. Keep an eye out on xda-developers.com forums for the official release of a multitouch enabled rom any day now.