Generating randomized shapes or edges

Hello
I'm trying to generate random billowy shapes (like cartoon clouds or bushes) by simply creating a shape and applying a some kid of brush/pattern/style/script/whatever to it and getting a look like in the below links.
The look I'm trying to achieve is visually simple, like the following:
http://www.clker.com/cliparts/L/U/m/P/b/J/cloud-md.png
http://static5.depositphotos.com/1003938/423/v/950/depositphotos_4232591-Clouds.jpg
I can easily draw those kinds of things by hand, however I want to be able to generate such shapes randomly.
Is such a thing possible? Are there existing brushes/patterns/styles/scripts that can pull this off? So far my search has come up with nothing, unless I'm searching wrong.
Generally I'm aware of what brushes and patterns can do, but as far as I can tell they always generate the same results each time you use them.
Perhaps a script can be made to do this?
Essentially a cloud could be drawn as a bunch of random circles grouped together, then all of them get merged into one shape.
I've never scripted in Illustrator before but I'm comfortable with code, however I'd like to avoid spending that time if someone has already done the same thing.
Cheers!

I did find some interesting scripts on Adobe Exchange... these things I didn't see in Google results =(
http://www.adobe.com/cfusion/exchange/index.cfm?searchfield=cloud+random&search_exchange=& search_license=&search_rating=&search_pubdate=&Submit=Search&num=10&startnum=1&event=searc h&sort=0&dummy_tmpfield=

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