Try to increase your followers or else twit some more interest and important things. Then they might be following you. I found some sites there are sharing twitter like and plus like (twinds.com). Make more points and reduce it for what like you want. Give a try on that.
I want to use either Mambo or Joomla to setup a website, but I'm not sure which I should choose. Which CMS do you think will have more support and features in future? Which do you think is better now?