Hey All -- author of tweetgo.net here -- a couple things.

1) Tweetgo.net is up and running again (misbehaving VPS) and will remain up and running for the time being!
2) I also open sourced tweetgo.net so if you want to host it yourself, you can: https://github.com/mthomas/tweetgo.net

Cool to see people are still using this long after I've stopped --- hope this helps!