I'd like to see an addon that keeps your friends list current with all of your chars. Im not sure how you would do it, maybe set it to keep track of a certain char, and sync all the others with that char or something, but I just really want something that does this, I have 3 chars on one server and only 1 of my lists is up to date.
It'd be nifty for someone to polish up the friend/ignore list mods. That "spam" comes from the mod trying to add a friend or ignore when the player no longer exists. The mod just needs to watch for a confirm/error message and adjust the global list accordingly. This would also make it easy to prune out friends that no longer exist... heck you could toss in a "reset list" feature that would remember your list, remove everyone and re-add them, noting those friends who came back "missing" and clearing them from your alts' friend lists.