Nice work Peter. I wrapped this in two lines of Sinatra and deployed it to Heroku, so anyone can get an RSS feed for their username:
http://hackernews.heroku.com/username
Out of curiosity (and in hopes of eliciting a reply to see if it shows up in my new Hacker News Responses feed!) would this also be easy to do with Yahoo!Pipes?
I wondered about that. I've been using Pipes a little lately but am no expert. I'm not sure if Pipes can deal with operations upon non organized content. You could probably use a service like Feed43 first though.
Out of curiosity (and in hopes of eliciting a reply to see if it shows up in my new Hacker News Responses feed!) would this also be easy to do with Yahoo!Pipes?