It'd be useful for keeping the forums clean and getting rid of old threads that are no longer relevant.
Support: introductions are difficult to tell apart from discussion threads when they're put in the same archive.
Couldn't you just talk with fungamer333 about it? I'd be surprized if she wasn't habilitated to make such decisions herself as a Forum admin.
If we make an introduction archive, what would you feel like the appropriate time to archive an intro would be?
After around a month of inactivity. The post can always be moved if the player wants to make it active again.