The Coderwall site scrapes your public Github information but doesn't show you any "achievements" until you tweet about "@coderwall". Seems like a shady way to kick start a developer community.
For Twitter, you may want to use Paper.li to track the stories linked by people you follow. You can also add in hash tags, lists, and a few other non-Twitter sources (e.g. RSS feeds) as well. I have two that I use, one built around my "Security" list and another based on two or three hashtags and my "Data-Science" list.
