Even though Dell ran that survey about AMD vs. Intel processors, I read from here and other sources that Dell doesn't want to support AMD in fear of upsetting Intel. Even though AMD has 20-25% of the CPU market, Intel still holds the rest and supporting a rival company might cause Intel to retalliate against Dell by raising their bulk CPU prices. I'd love to see an Athlon 4/GF2Go solution by Dell, but it'll never happen. Besides, that Inspiron 8000 is kinda bulky and heavy, if you're gonna get something that bulky and never take it anywhere, you're better off with a decked out desktop at $2000.
I agree with grimreaper19, buy a laptop for your portability needs and a desktop for your gaming needs. I bought an IBM ThinkPad T20 today (hint, check the Hot Deals forum, it's a godsend 😉, this thing retails for $2500-$3000 at most sites), from what I've read, it's light, powerful (don't expect to run the latest games with it though), and has excellent battery time. I'm going to use what I saved to buy an Xbox, that's pretty much a computer anyway.