First off, let me say to the devs that I love this game, it's great :) I just started a week ago, and I'm already addicted. I noticed on the FAQ, Design and Technical site the existence of the "/playmusic", "/stopmusic", and "/playlist" commands to make use of the builtin .ogg support. I've been using these in-game, and they're awesome. However, I could also use some commands like "/nextsong" and "/prevsong" or something similar to help me scroll through my playlist. Also, "/playrandom" or "/shuffle" would be great.
Secondly, there have been times when I have undertaken joint ventures with members of other nations in the game, such as learning trading routes, or joint capping. Some sort of command similar to "/friendly <Name>" would be great, so when I searched for the closest hostile target, these players would not be selected, and possibly also so any homing missiles I might need to launch would not go for them.
I realize the devs have a lot on their plates right now, and I know the importance of adding these possible commands falls far down on the list, but in my opinion, they would be a few hopefully easy adjustments that would greatly improve certain aspects of the game.