Well, you might be expecting that I will start putting the names straight away :) if you are here it means you want to know a little about those communities, ok then wait :).. Well definitely I would start with the larger communities, so I will pick the hot name swish-db, not becuase I am admin there, but becuase the stats rock and the staff team is extra ordinary.. here you go..
 
This is the largest swish community site on the internet today with more than 90,000 registered members ,  more than 650 tutorials and about 1500 files to download and learn. This is not only me who say that the staff is extremely helpful but they alwasy willing to share their knowledge and reply instantly to your questions, well I will stop here you can see by visiting the link and  you will find I have said.

SwishTalk
http://www.swishtalk.com/

Swishtalk is the second largets community for the swish users, and once it was teh largest when its name was swish-tutorials and Brian was the Admin, was extremely active, helpful and useful. Now, since its renamed and owned by another company it still has a lot in their forums, useful topics but its not that much active.

13Dots

http://www.13dots.com/

This is yet another swish community, this community do not concentrate mainly on swish, but they have expanded their forum to everything on internet, designing, legal documents, contests and much more. The good thing is that its agian very freindly community where you can find a lot of useful information.

DesignsXchange
http://www.designsxchange.com/

This is another siwsh user community with very useful forum and downlaod center, I guess they have tons of useful files in their downloads area, William has provided tons of FREE templates to use.

Flashkit Swish Forum
http://board.flashkit.com/board/forumdisplay.php?f=17

This used the be the first swish help forum, tons of information, not much active but still worth visiting.

Swishzone Swish forum
http://forums.swishzone.com/

This is official help forum by the owner company, its worth visiting and browsing, tons of useful information here.

SWISHscript dictionary
http://www.swishtutor.com

It is a personal project by Eduard Boka, intended to help swishers all around the globe. Here you will find all the SWISHscript terms you ever wanted to know about. To use a sample from the dictionary, simply copy and paste it in SWISHmax and test your movie. So stop searching for answers, you have them all here

 
Swish Tutorials
http://www.swish-tutorials.com

This was one of the first swish communities, but then it was sold and merged with swishtalk. But ST still has tons of free useful files and tutorials to read, there is no forum, but it can help you with a lot of helpful information

ok that for now, I will keep updating this thread soon as I find other good communities, if you know some of which I missed, please do send me the link, and I will update my article.