That Other Site has functions for multi-quoting in a thread, letting you flag a post for followup and then reply to all the ones you want once you hit the quote button on a post. They've got another feature running that I've come to love: quoted text has a small link by the name which will take you to the post that was quoted, so you can read the full text instead of the blurb the quoter wants to highlight.
They also use vBulletin, albeit v 3.6.8. If its possible after the upgrade, it'd be great to have these tools here too.