I was really surprised that CF reader is not useful at all! No, it is not a problem of supplier. I read forums about that problem, they said - SD and CF readers using PIO mode, as this is PCMCIA device. It was long time ago and i thought it is solved, i was using my old P2010. I was using this port before as a reader to download pics from my digital camera. No, CF is still slow, you can't play music or even click my mouse during coping operations. But there is a good news. SD card reader now working fine, not like on U810. I bought Sandisk SDHC 16GB, i can transfer about 5mb/s and computer not going to die like then using CF slot. Well, to download photos from CF i still need external USB reader, but SD slot can be used as external drive for backup.
Also notebook come with Windows Vista, so i can recommend install some good SD for ReadyBoost. I m testing it now. Think it is actually can improve performance on such a slow UMPC as Fujitsu U2010 is.