Homebrew development has been around for a while and occasionally a decent game will come out, but I just caught a link to a site where they have ported over various Doom games to run on the DS with pics of the DS Lite running the game. Pretty sweet if you ask me. The port doesn’t make use of the touch screen, but it does have full WiFi access. Can you say portable multiplayer Doom?
Source: [url=http://dsdoom.devkitpro.org/]DS Doom[/url]