Over at the VoIP Service Blog, they've gathered all of the available projects on the web that seek to add VoIP phone functionality to NIntendo's dual-screen handheld. In collecting all of the listed projects together on one page, it quickly becomes apparent that a viable use for the DS as a kind of phone is still far off.
Hopefully this won't be the case forever, however for the time being it seems we're stuck with just the dream.
*Verizon is currently in the process of acquiring AOL, Engadget's parent company. However, Engadget maintains full editorial control, and Verizon will have to pry it from our cold, dead hands.