Shoutbox

For your second question: You can colorize your psm. But it is not blue by default, are you mistaken? The "What I'm listening to" messages are blue by default.

To colorize your psm, use /psm command in a convo window to make things easier. After /psm, type your personal message, highlight it and choose a color from Plus!'s Format Panel. You cannot see the result in your contact list, but people who have added you will see if they have Plus!. You can use your own contact card to see your psm in color as well.