Just to make chat slightly less painful to use:

1. Tab completion!  Any mIRC user (or anyone who\'s ever used a bash shell, for that matter) will know how useful this is.  Type the first few characters of a name, press tab, and it autocompletes the name based on the list of who\'s online.

2. A history function.  Now that say/shout/tell all works properly, I find myself saying things I meant to shout, and having to type the entire line again.  It would be insanely useful to just press \'up\' and insert /shout at the beginning of the line.

Also, are tell commands case-sensitive with regards to player names?  I think this is what caught me out once, but I may be wrong.  If they are, they shouldn\'t be!