How is it decided which questions get tweeted by the stack exchange programmer twitter account?
http://twitter.com/#!/stackprogrammer
Is it a choice by a mod or just automatic every nth question?
It's algorithmically determined based on hotness, without repetition (no duplicates).
https://softwareengineering.stackexchange.com/?tab=hot
The (mostly) complete list of twitter accounts is here:
http://blog.stackoverflow.com/2011/01/twitter-question-feeds-for-stack-exchange/
