I created both a Twitter and Plurk account years ago but just couldn't get into it. Then one day Kevin Honeycutt came to town and we sat down to discuss the pros & cons of Plurk. Well, from that moment on I've become a big time Plurker! I post almost daily and try to answer others plurks every other day.
The advantage to Plurk is when I have a training or presentation to give I can turn to hundreds of educators to give me feedback before I do my presentation. I've found hundreds of useful websites and software programs to use thanks to Plurk.
I now, have my Plurk so it post on my blog site and my Twitter site. I did have it posting on Facebook but I didn't think it fit well with the Facebook model.
I strongly urge everyone to explore the benefits of mircoblogging