If you are a newly Sony Vaio P user and frustrated over the $ you spend on such a fine piece of hardware but have to live with the mediocre performance offered by M$ Vista. I'm glad to inform you that I'm now a much much happier customer using Windows XP on Sony Vaio P.
You can also be one by following the instruction found in http://forum.pocketables.net/showthread.php?p=15670
Allow me to let you know that the performance gain you get from a OS downgrade is what we called a Day and Night difference. Going thru the hassle of doing a downgrade is definitely the wisest choice to be made than to stay with the warranty offerred Vista solution.
It's unknown officially why Sony decided to embrace a memory and CPU hogging OS such as Vista on a low-end CPU like Atom, but unless there is some undertable agreement with M$, or if customers get free or discounted upgrade later when Windows 7 is out, we know Sony has made a fool out of the customers purchasing this product with Vista installed and no official solution to downgrade to XP.
Allow me to list out what you gain and lose when you did an upgrade
1) A much more responsive system, gone are those graphical updates that never keep up with your mouse clicks, refresh of graphics or webpages that are so slow that you thought your eyes are playing tricks on you.
2) More memory and cpu processing power to run more applications multi-tasking at the same moment.
3) More productive on your leisure activities such as surfing clubsnap on the browser, chatting with your friends, listening to music, watching a video. If not these cases, probably you are seeking a balance between swallowing that frustration of waiting and lags happening, and smashing the small little cute expensive toy you just indulge in.
4) Sony put a Energy Saving sticker on the machine. That is a joke, with CPU hogging OS eating away precious battery, means you need to spend longer time to complete your activity, where is the energy saving ?
5) Watch your youtube full screen with very little frame drops, hardware based video rendering on MP4/DIVX video with hardly noticeable frame drops.
6) Move your cursor without hipcups along the screen and dragging and resizing of the windows without stuns.
7) Booting up your system in less than 30s instead of more than 1min
8) Having whopping 45+MB of free space versus 25+ of space left after the factory installation of Vista from Sony with tons of TRIALS APPLICATION.
9) No more slow and cumbersome UNINSTALLATION, versus INSTALLATION of your intended applications.
10) STAY HAPPY AND SATISFIED.
1) Less of those eye candy GUI that you fancy in Vista
2) Less assurance from Sony that your system is probably out of warranty
3) Using a more obsolete operating system that M$ is trying hard to discard in the market or not going to support in the near future.
4) Not in sync with your laptop which is probably using M$ Vista
5) There could be more, but I'm not interested to know. Probably you are