Atheros will ship a/b/g and b/g chips for PCI Express in third quarter: This next-generation bus design supports a much improved architecture for maximum throughput across all cards, and Broadcom and Atheros are both interested in being on top of its deployment. Atheros says that they have a single chip solution that integrates into a single-sided PCI Express card; sampling is already underway to its best customers.
Broadcom announced in early April that they have a PCI Express chipset--ostensibly at least two chips--that's was in sampling then. I expect a war of the words over throughput, cost of goods, and other factors in the months ahead.