Lula is Estelle Harris (George Costanza's mother in Seinfeld and Mrs. Potato Head from Toy Story 2).
Arabic dub. It was one of few Disney series to be dubbed in Lebanon instead of Egypt (the other noticable shows dubbed into Arabic in Lebanon are Kim Possible (only season 1-3), Lloyd in Space and Fillmore!):
Keep Circulating the Tapes: In addition to being trapped in cancellation/hiatus limbo, the show has NEVER been released to DVD. Your best bet of seeing this show is Youtube, they got every single episode. In fact the only merchandise the show ever got was some McDonald's toys.
Real-Life Relative: Princess Irmoplotz and Queen Zonthara are voiced by Melissa Rivers and Joan Rivers, respectively.
Screwed by the Network: The show was one of Disney's most popular cartoons at the time, and had great ratings, and critics loved it. Gregory Peck even called Dave "The next Mickey Mouse". And yet without explanation they ... well, they didn't quite cancel it, but simply not make any new episodes and dropped all mention of the show off of their website. Six years later and apparently they still haven't announced whether they have officially cancelled it or not.