I have been active on Twitter (@tomshepp) for a while now and I find it a useful way to stay updated on education and technology news, as well as sharing resources with others. There have been a few times that I have asked questions on Twitter, or tweeted (messages sent on Twitter are called tweets), and received some valuable advice from some of the people I follow and who follow me.

I receieved a bit of a surprise a while back when I tried to follow someone on Twitter and I recieved a message informing me I could no longer follow anyone and to look at this web page for more info: I can't follow people: follow limits

I had hit the 2000 following limit. Apparently, last year Twitter decided to include a limit on the number of people that you could follow.  It seemed like a anti-spamming move but I was surprised to read the that, "...Twitter does not use follow limiting to monitor spammers. Though follow limits do help with spam control, the limit itself improves site performance by ensuring that when we send a person's message to all of their followers, the sending of that message is meaningful.  We believe that following 2000 people is a reasonable limit for the number of people an average person can follow" (http://help.twitter.com/forums/10713/entries/14959.

Another interesting comment is "Twitter may facilitate social networking, but it's not a social networking website"(http://help.twitter.com/forums/10713/entries/14959). Apparently Twitter believes that 2000 is the upper limit that anybody can reasonably follow. Should this not be up to the user? 

If you are using Twitter I encourage you to have a look at the Twitter limits. It is an interesting approach to social collaboration.