One of the things that made Google apps the web-based productivity suite to beat was the ability to access your information offline using Gears. When that experiment was killed, many of us let loose a single tear as we contemplated returning to our desktop apps. Well, as promised, HTML5 is finally returning Gmail to its former offline glory. Docs and Calendar will follow in the coming days, but anyone can get access to their Gmail accounts offline now by installing the Offline Google Mail app f