OK, big deal. I just setup a new add-on that put the limits on PMs back in which is good but it also adds new features. You can sticky a private conversation now in your own inbox so it's always at the top. Hit the checkbox beside the title of your conversation and a little menu pops up asking what you want to do. You can also star a conversation if you don't want to sticky it. If you're selling/buying stuff, this is a huge help.