There were rumors about one coming out (possibly in some kind of bundle?) somewhere at the beginning of December. Don't know if that'll turn out to be true, though. I, myself, was waiting for an all black model, but ended up picking up the blue one when it was on sale a few weeks ago. Not as bad as I thought it would be, to be honest.
Formerly known as funky1 On Twitter @ MattShaneCEP - tweeting about games, music, shows, wrestling, etc.
I feel you completely on the Black/Black option as it was what I had for my DSi XL (Bronze). My favorite color is red though (blame the creators of TMNT for making Raphael so cool back in the 80s), so I got the red one. I got used to it. When you're playing it, the inside of the XL is all black anyway.