Which of these 2 mini social networking sites works best for a blog? Plurk is much interactive and controlled than twitter. Twitter however is more popular. Should I just use both?
Using both would be the best Idea, if you like them both. Depends completely on you though, and there is no problem in using both of them.
I prefer Twitter. I got more traffic on my websites with the help of Twitter as compared to when I was using Plurk. I also enjoy sending tweets using my mobile. Don't know why I can't access Plurk on my mobile phone's browser.
I prefer twitter. If you use a self hosted wordpress blog there are tons of plugins to make using twitter to get traffic to your blog easy.
If you HAVE to pick one, I would also recommend twitter. Twitter has MANY more users than does Plurk. The potential with Twitter is enourmous in comparison.
If you have the time, then use both sites. But personally, I would stick to Twitter. It generates more traffic than Plurk.