On top of that, according to IGN Dreamcast, you can also download the new extra track; that is, if you get on the Japanese network:
With today’s release of Samba De Amigo, the online Dreamcast home of Dricas has opened up a section for that game. So far in this section you can (if you are on the Japanese network) download the first bonus track, “Open Your Heart” from Sonic Adventure, and view other assorted Samba De Amigo information.
For the non-Japanese Dreamcast network users, the only treat we get is the commercial for Samba De Amigo. While it is no where near the Chu Chu Rocket ad in terms of hilarity, it has a healthy dose of high-pitched Japanese people trying to show off their Latino heat.