$150 is a great deal for the DS and it comes with two games: Metroid Prime Hunters and Pictochat. I'm really excited to see what kinds of game ideas developers can come up with this system. EA has already announced Goldeneye, a Madden game, Tiger Woods golf and more. I also know Square Enix is making an rpg for it. A castlevania game too from Konami, i can't wait. It plays all GBA games too!!
I didn't know it played GBA games too. If that's the case the DS shall be mine!!!! (hopfeully it can still link up to the GC for some 4 swords goodness)
I also know it's WiFi compatible and if you have a wireless router or are in a certain "hotspot" you can play with other people across the country. Sorry I can't explain the details of it very well as I don't know much about WiFi