32Gb Corsair Flash Voyager is £175 from Scan, so it's not far off!
Personally, I would rather lose the speakers and get a wider screen that can display 1024 width, as I believe that would be much more browser friendly. Reading up on the EeePC forum it's amazing what people are doing with these little machines. The touchscreen mod looked quite good as was adding 2 internal USBs for flash drives. Lot's of potential...