This is a script to check if there are any two-letter usernames available on Github because they are clearly superior.
Currently (as of April 4 2015), there are none available. I got the last one >:D! Although one may become available if an account is deleted.
Requires python 2.7, mechanize, and BeautifulSoup.
To run:
python twoletter.py
Disclaimer: I don't actually know how to code python. It takes about 15 minutes to run.