It is a sign of the quality of this site that the Sony PSP web browser works perfectly with it. The only problem is that if you have your board setting set to "small" it is still just too big to get it all on the screen at once.
Would be great, for me at least, if the small board could be just a touch smaller so I can play chess on the train without making even more dumb moves than I do using a proper size screen 🙂