I need to be wired (or wireless). like, ALL THE TIME.

No, actually. the Dreamcast OS runs on Hitachi SH4 hardware, which windows CE hasn't supported since a much earlier version.
WinCE originally supported ARM, MIPS, and SH3/4 CPUs. SH4 was never used in handhelds, AFAIK.

Also, you'd have to emulate the sound and video hardware. Something that's only new being done with some success on a modern PC.

soooo... ReactOS/Wine gets a boost?

Jarre's Laser harp was nothing more than a trigger set. An impressive one, though.
I remember it being totally awesome when I was a kid. Going back and seeing the concert video recently showed me how utterly naive I was :P

Good showmanship.

Am I the only other one that remembers Adventures in Odyssey? I loved that show, so much good voice talent. Many of the actors do a lot of work elsewhere, I've heard them in everything from commercials to video game voiceovers, as well as a couple of current cartoon shows.

WII! I want to hug it and pet it and stroke it and call it... waaaait.
I'm actually in the middle of playing through Metroid Prime 2 in anticipation :)

BeOS 5 Pro doesn't like P4-class machines, unfortunately. This uses a core closer to a P3, so I don't know if it would work or not. It might have issues with the chipset.
The free BeOS 5 Max based on an updated BeOS 5 PE might work, and Zeta would likely work as well.
I want to get a 4GB SD card and load it up with various OS images that I can easily throw on the device at a whim, for just this purpose :)

Yes it does, although I believe the OS image is actually on a hidden partition.
I might be wrong, about that, but I do know it does include a CD and a method of restoring it back to factory defaults, including the OS.

@CosterMonger

Yes, it runs both NES and SNES perfectly, although you have to tell snes9x to run sound at 44.1KHz or 22KHz - the sound chip doesn't like 32KHz output.

I pushed 2 simultaneous snes9x instances perfectly, the 3rd instance started bringing the choppy.

I'd say performance is acceptable. :)

As long as you're actually buying the songs from iTunes.