I've released the January libraries for both 3.0 and SE. I focused on "simple" shapes, as I've been seeing a lot of basic particle stuff in TV commercials lately. So most of these emitters look like they're done with Flash or something like that. It's a cool look I think.
In playing with these simple shapes, I found a new trick that allowed me to do some really nice "cartoon" smoke. I hope to expand on this technique in the future.