I'm really impressed with what I discovered while reading this article by a coleague of mine at the OU http://www.greenhughes.com/content/blurring-online-and-offline-worlds-with-mozilla-prism . I found out lots of useful tidbits. One in particular is the idea of mozilla prism. I'm going to be fascinated to see how this develops. In the world of offline applications we've been crying out for a simple solution to provide the web server and db technology in a standard available across all devices and this is a development I wasn't aware of.
Right now since the techonologies involved including google gears and adobe air are young, even in beta, I'm waiting to see which wins the race and how long it takes.