What is a good usb 2.0 chipset? PCMCIA cardbus type?

I’m looking for a cardbus usb 2.0 for my notebook…

Is there a certain chipset that is better than the others?

Is nec a good chipset?

Is there another way to get usb 2.0 without using the PCMCIA slot?

Thanks for your help

AFAIK, there is only the NEC chipset available. And I have problems with it…