Most gamers over the age of 15 or so remember a time when Lucasarts actually made games that weren't based in a galaxy far far away. However, many in the younger crowd might be surprised by this, so you'll just have to trust me. Games like Maniac Mansion and Monkey Island were great games, and they might just be making a comeback.
It seems that Lucasarts has been thinking hard about re-releasing their collection of older adventure games for the DS. Don't get too excited though, it seems that they've run into a snag that is preventing them from actually carrying this plan out.
According to Jeffrey Gullett, "the cart size of the DS makes it impossible to put out ports of any of our old graphic adventures ... There's literally not enough room on those carts to put the games out." So if they can manage to overcome that tiny obstacle, we might just see these games again sometime.