Tweeting "Warrior Forum Rocks!" or "I love Warrior Forum" would land in the Twitter feed under comments about Warrior Forum made AT amplicate.com -- the same would be true for "Warrior Forum S*cks!" and "I H*te Warrior Forum!"
I know another gent who has a website which harvests and posts all tweets from his followers that use all the characters alloted. Useless or not, is not what I'm after here.
What is that called, in online jargon, when an action in one part of the internet triggers actions at another part of the internet? And can you think of any other examples?