Yeah sorry, I only read the first page and a half, so I'm not sure if anyone said this but..
One thing I've always wanted to see in Messenger Plus! is 'message prefixes'. For example you could have it so you could put a line of text for a prefix and every message you sent would have that before it. That seems sort of useless but for things like the Fader plugin and leet speak plugins, or background colour tags, it would be pretty practical.
Other then that I think Messenger Plus! is practically perfect. You did an awesome job on it!
