Datel's Games N Music (Say what you will about AR by Datel... But this product rocks)
I just got this for my birthday, and I LOVE IT. I currently have a couple 2 GB MicroSD cards coming, so I can fit more than 128MB on the free one that comes with it. Right now I only have 3 episodes of South Park on it. But with the 2 GB, I'll have afew movies, and then on the other one, maybe some south park, and some music. might keep the 128 MB for music and the games that it came with. I love this though, the video quality is pretty good. The sound isnt the best, but is much better if you plug in some headphones. If you have a DS, this is a definte recommended product to get.
Yes, AR is action replay. Which is made by Datel. They are the same people who made the Games N Music. It just takes a micro SD Card that will store, videos (you can convert them using the program that comes with it), music, and homebrew games. Comes with 25 free games. (Most are lame). But the video and music rocks. It comes with an adapter incase your computer doesnt read Micros... Wonderful product. Their best in my opinion