Hi everyone!
In Semantic MediaWiki we have great but very long documentation. I've tried to write a small introduction to SMW. It's only in Russian now (I know that some amount of Russian MediaWikers are reading this mailing list), but I think to write something similar in English (maybe to IBM DeveloperWorks).
http://habrahabr.ru/post/173877/
If you don't know Russian you can enjoy the pictures anyway ;)
Cheers, ----- Yury Katkov, WikiVote