Nice, but I think the list of activities that you enable people to tweet are not that interesting in my opinion. Tweeting that I opened an issue in some project is more interesting to developers than when I start watching a repo.
Granted, I did not log in, since it requires Twitter, so I might be missing more options.
Is this something that could be rolled into ifttt.com? You should talk to the guys over there via this link: http://ifttt.com/api
If This Than That (ifttt) connects popular, public APIs and bridges them to create Trigger/Event pairs to automate tasks.
Why not just grab your RSS feed and put it into TwitterFeed or dlvr.it?
I think it could be the next feature for ifttt.com. That's it
great idea i know my developer would surely use it :)
This just in, all the people who care about what I do on github just follow me there.