If you've been living under a rock you might not have noticed that javascript has kind of become a big deal lately. While some people get defensive about the future of Flash others are seizing the opportunity to apply their existing Actionscript skills to the growing movement to move much of what we've traditionally done in Flash into the browser using new HTML 5 tags like "canvas".
One of those people is Keith Peters, aka Bit-101. He's been doing crazy stuff with Flash for a long time, took a brief sidetrack into iPhone development and most recently has been posting an extensive series about working with javascript.
A few noteworthy posts include:
A look at available development tools: http://www.bit-101.com/blog/?p=3112
An introduction to Canvas: http://www.bit-101.com/blog/?p=3074
And of course, a post on Particles: http://www.bit-101.com/blog/?p=3148
For all his posts visit Keith's javascript category link: http://www.bit-101.com/blog/?category_name=javascript