It was mentioned somewhere on the web that a DS version is in the making. It would be a compilation of both games like they did with EXE5-DS. Would be cool if it we're Wi-Fi compatible, i'm dying for online battle.
There's a OST out with the music from EXE5-DS and EXE6 but doesn't hold the complete soundtrack which sucks a bit. Guess they release it later, who knows. Personally I didn't like the DS music at all. It wasn't bad but if you compare the music with EXE5 GBA then you can clearly notice that they scrapped a few instruments out of the background music for most tracks. I did like the redone battle themes for each EXE game
Did you know it's already
Rockman's 20th Anniversary? Time really flies. Capcom put up a special page which shows a nice art piece of the hero in the new Rockman game:

They mentioned Rockman isn't available in his Navi form. Some other shots revealed red eyes on the buster of Rockman making it look alive pretty much... I bet that's him now. Maybe the hero's companion in his non-transformed form is a robot dog, pretty much like Rush. Who knows, next month's CoroCoro will tell

The website
Atomic Fire has more on this. Read more about it
here and
here
EDIT: This is the shot I was talking about
Jam it back in, in the dark.