I'm going to get a wii in a couple of years. I have a gamecube that i'm really enjoying, and in a couple of years, availability will be up, and prices will be down.
You forgot the old Game & Watches (Pre-GameBoy), GameBoy Light, and the Play it Loud GameBoy. (I didn't name 'em.) If I wanted to be specific, the SP had a Mark II, featuring better backlight.
Not necessarily; I call them portable game consoles--just like computers are. Personal computers are categorized as desktops and portables, the major difference being the portability factor brought by the LCD and components made in reduced sizes and the battery. Game consoles are the same way (since they technically are computers after all--just designed specifically for gaming).
The PSP is good. A little overrated, though. But I think they could make a good rayman game on the PSP. Still, Rayman Advance and Rayman 3 GBA are great games. I bought them both yesterday.