twitterfeed can post directly to twitter, identi.ca, custom laconica installations, and via HelloTxt or Ping.fm, simultaneously to the many platforms supported by these services.
The rank-and-file citizen is still far more likely to start a contagion than an "Influential." Watts believes this is because a trend's success depends not on the person who starts it, but on how susceptible the society is overall to the trend–not how persuasive the early adopter is, but whether everyone else is easily persuaded.
As soon as you get to a handful of machines as part of your production environment, hire someone who loves ops. You want an engineer who absolutely can contribute to your development and help advance features, but if given half a chance will work on installing better server monitoring, improving the deployment process, looking for security holes, moving to point-in-time recovery for your database and so on. And, yes, there are people who absolutely love this.