Well i been lookin at this ds web browser that was just recently released. It includes a ram expansion of 8mb that will connect in the gba slot. Search "Nintendo_DS_Memory_Expansion_Pak" in wikipedia for more information. The new Ds web browser supports java but not flash
Whoopsie, haunter mentioned the memory extension. But he didnt mention the browsers capability!
It wouldve been cool if the ds browser could take some media but it says it cant support videos so thats a bummer.