0. Matasano challenge used a web interface, and it was quite pleasant. Doesn't really matter what the "view" is so long as the goal is accomplished. But if folks want to go down the boring cliché road of religulocity by insisting emacs is the only true editor[i], it would be disappointing.
[i] another example might be zsh vs. bash, a thread that would go off the right edge.
1. Part of it is learning proper style and communication means