Right before the press conference where Nintendo announced the DSi, Nintendo of Japan trademarked a barrage of terms related to the DS.
The huge list was made publicly available on the Japanese trademark database earlier today. Many of these trademarks sound like new DS features or services. Some like DSArcade might even be tantalizing. But, before any rumors spread about a secret development of a DS time traveling device start circulating, please note that many of these are probably protective trademarks. Nintendo has not announced any plans for a DSiMovie service, but any forward thinking company would reserve the name just in case they want to pursue that path in the future. This list is more like a brainstorming session of what Nintendo could do with the Nintendo DS and the DSi.