All three things.
I like classic gaming and computing, I have lots of classic machines in home and looking at the new software and hardware developments for them. I think Pandora is a great platform for emulation and being portable makes it perfect for enjoying those classics everywhere.
I like homebrew games too, I'm really tired about the situation of the games industry. Current games are too centered in audiovisual experience and forget the gameplay and fun. Games are too complex in the technical stuff that they got less funny and more into impressing to people in the tech stuff aka graphic whores and those terms. I'm also interested in certain minimalist styles more than those over-complex graphical styles.
I use GNU/Linux since many years ago and liking the Free (as in freedom) Software movement, even sharing most ideas with Richard Stallman and not being a zealot. I like a lot the flexibility and power of this big collection of software, the freedom that having the source code has and the evolutionary behaviour of this kind of software that gets very well adapted to the time in a way propietary closed-source never will be. I'm also interested in the rest of UNIX world too, but I prefer GPL licenses more over BSD ones.
There's another stuff, and it's that I always wanted a PDA and recently a UMPC. I had a second hand Palm a friend gave me, but it was in a very bad state and didn't last long enough. Now I'll get a Pandora and will able to fullfil all my desires
I have been following GP32, Zodiac, Gizmondo and GP2X communities since they existed. I didn't own any of them, not convinced me enough to me. Pandora convinces me more than enough and is the kind of device I wanted to have (just lacks built-in 3.5g+ connectivity, but bluetooth and USB solves it and better because those standards are still evolving to being really universal) since more than 10 years.
I didn't pre-ordered mainly because lack of money, but the latest problems should have made me a heart attack if pre-ordered ;-)