Thinking About the Pertelian X2040

I came across the Pertelian X2040 in my web travels today.  It's a general purpose LCD display system that hooks up to your computer via USB.  It's available for purchsae from ThinkGeek for $48.99 which isn't bad.  I'm almost tempted to get one, but I'm not sure what I'd do with it.

There are a number of applications listed on the Pertelian web site.  Displaying weather information, stock quotes, RSS feeds, etc.  I'm sure I could use at least one of those things.  But I'm not sure that it's a "must have".

If anyone reading this has one and has found a truly killer app, I'd love to hear about it.  If I do end up buying one, I'll certainly let you all know what I think.