You need at least an ATi or nVidia #600 or higher level solution for gaming.
A GMA 950 is about as powerful as a 5 year old FXGO5200 which was mediocre for gaming when it was released (I know I had one).
Seriously ATi X1600/HD2600/3600/etc or nVidia GF7600/8600M/9600M at least for a 'gaming' PC. You can get away with #400 recent models, but all your setting will be lower for a game like Halo. CS and WOW are easier.
Well, in summary Gaming laptops performance is function of two factors: CPU and GPU- the processing units.
At the moment NVIDIA 9600M is pretty cool card, and Intel T6400 CPU or above should be fine.
With these combination it should be able to play 90% of the games on the Market. (27th-March-09)
New Graphic cards with even better quality/ low power consumption will land on shops very soon by August 2009, hope that will cause reduction in prices for gaming Laptops to some affordable level.
There are some good quality Gaming laptops on the market from Dell, and Acer etc and prices are dropping as of writing this response on 27th March 09. I would say laptop with NVIDIA 9600M Graphic card, and price tag of $800 or bellow will an excellent deal .