http://www.rdrop.com/~cary/html/pc_card_faq.html
I have found a rather lengthy FAQ on cardbus technology that you might like to take a peek at. I haven't had time to chase down the exact throughput spec of the PC slot - nobody seems to quote it, but I'm sure it is in the FAQ if you've got time to read it.
Keith Palmer
Zytech Marketing Pty Ltd PO Box 342 Bunbury 6231 Phone: 0419927101 Fax: 0897915900 the online FireWire data storage store - http://www.zytech.com.au/ Remember to get your FREE colour business cards - http://www.zytech.com.au/contact.html