I am comp500. For a nickname, call me comp, or for a short 'tradename' use c5. Despite my Scratch Wiki name, I prefer to be called comp500, not Comp500.
I am not always that active but occasionally come on to update statuses and work on projects.
Be warned that I often forget about/stop developing projects.
You might also find me on: Github, BitBucket and the ComputerCraft Wiki. If anyone finds any others ask on my talk page: although PMing me on Github/Commenting on my Scratch profile is generally more reliable.