Erin, where would one find one of those Lumipads?
I got mine as a gift for Christmas of 2003, but at the time they were available at Brookstone. About a year ago I saw them at Dry Ice - the shop with psychedelic colors and lots of feathers in the malls. At the time they were going for around $40.
Online I haven't had too much luck... this one
http://www.ecrater.com/product.php?pid=26487 is $98!!! This place
http://www.loftykids.com/ST1113.html has it for $45, so closer.
I will say that if you get one, be sure to take the batteries out when storing. The button invariably gets turned on and you'll have to replace them if not. The screen also has choices to flash your message either the whole thing at once, or in 3 sections in various combos.
It's an expensive toy, but SO much fun. I do a show that usually runs over 60 performances and the cast and crew want to be entertained backstage. This thing even has a mini-easel stand behind, so I can write a message, prop it on a set piece backstage, and leave it "on" with my message during a scene shift/mass exodus/crossover, etc. (Out of sightlines of course). I also have used it to get the attention of the person in the booth next to me (through a glass window). You can't have your mic on though, when it's on, as it does emit a very fine high-pitched noise, which carries quite well in a headset system.
Erin