Kotaku has pics and info on the Third Generation of the Nintendo DS; it's thinner, lighter, but dumps the GBA card slot.|
I'm actually a fan of the original DS - the GBA-SP-style shoulder buttons on the Lite just suck!
As for the rumoured additions, both have proven to be correct, with "audio enhancements" made to the handheld, while it will also now include a .3 megapixel (640x480) camera. And that's just the start of it.A 640x480 camera is kind of piddly - most people have a better one in their phone these days. As for the SD card slot... interesting potential there.
The DSi also features an SD memory card slot, making it possible to take pictures with the DSi and then view them on the Nintendo Wii. The DSi features a built-in browser, and it's possible to download games and keep them on the DSi.