A fella by the name of AliasZero is currently working on HelloDS, his version of voice over IP for- wait for it- the DS. It uses the built-in wifi and mic to allow DSers to speak with one another over the net. It already works in its early form, version 0.1a, and can be downloaded right now if you have the proper equipment. The more fleshed out version o.2 will be up within the next day. More info can be found on AliasZero’s site.