It's a bit low spec (on the GPU side), and I hate cheap compaq, but I know Guild Wars runs fairly well on Intel GMA4500HD (I have a UL30A), so even a HD4250 will run it OK.
However, if you can find an Acer Timeline 3810TZG (switchable GMA4500HD / HD4330), or an Acer Travelmate 8731 with also a switchable GMA4500HD / HD4330, that'll be your perfect travelling companion and will be able to play GW. With great battery life, low weight, thin and powerful enough for office work and videos. I know you can find them in the UK for under £400, so I'd expect them to be available for around or under $500. You also have the bigger brother, the 4810TZG, with an added optical drive. They're still fairly cheap. Also, usually bottom-feeder Acers are pretty low quality, but those are basically business models, so much better quality than the typical cheap 15'' Acers you may find.
And it will quite possibly play GW2. It's still speculative since I haven't found their min spec requirements, but I doubt their CPU requirements will be much higher, and it should scale all the way down to third-tier mobile graphics cards.
The fusion chips have still 6-8 months before they make it to production notebooks and netbooks. But these chips should run GW1 / GW2 really well.
I must say, It's not the best to play GW on a laptop, an external mouse is recommended. But these thin and light notebooks (basically, supped up netbooks) are awesome. I take mine everywhere.
Last edited by Iron Monkey; Nov 23, 2010 at 11:52 AM // 11:52..