I did a web cast today on developing web apps with web workers. Hope you folks found it useful. The recording should hopefully be available online soon. In the meantime you can download the deck and the demos from here:

https://skydrive.live.com/?cid=2C5064CB54B16F50&id=2C5064CB54B16F50%21314&sc=documents

Do feel free to leave any questions you might have as a comment on this post or email me or message me on twitter and I'll be happy to answer them. I also have a plan to make a post talking about some of the interesting bits of the "FilterMe" demo that I showed on the session (also available for download at the link given above) today, but whether that actually transpires or not remains to be seen!