Mario Party DS preview at Games are Fun.

"It seems as though Mario has been caught at a party that will never end. Mario Party 8 came out for the Wii earlier this year, but like that obnoxious guy wearing the lampshade that just doesn't know when to leave, Mario is still partying in the virtual realm. Still, his newest outing looks like it will be a huge success for the portable partygoers among us. Nintendo used the E for All Expo to provide a playable version of Mario Party DS; as a game, the Mario Party franchise just might make the most sense on a portable platform, since that means it can be played anywhere (as long as you've got friends with DSes)."

Full Source: Games are Fun