Yea its just a demo so far :/. I think another team is working on X-Com for DS as well.
Well you also need a MiniSD card and a MiniSD card reader which puts the price back up to like $100 or so depending on what you get.
A mini SD card reader comes with the R4.
Anyways, I found more awesome games that I'm becoming addicted to.
Word UpYou drag the stylus across the letters to make words and keep the letters from making it to the top of the upper screen.
MeteoraBasically your job is to stop the enemy from hitting your planet with it's meteors, and to counter attack and destroy him. The game has a unique spell system that lets you combine spells for more powerful effects.