From $16 now to $6.50 by end of year: That's for 802.11b; g chips should drop from $18 down to $10; b should wind up around $4 next year.
Since the cost of chips is one of the fundamental multipliers for any Wi-Fi equipment, a drop in price by nearly half to two-thirds could shave 10 to 30 percent off the cost at street. A $100 access point could drop to $70, for instance. PC Cards are already as low as $50 and there are some basic costs. I would expect the bottom of the market is $35 for PC Cards, $30 to $35 for USB, and $50 for PCI. Access points could wind up as cheap as $50.
Access points/routers can already be found discounted to circa $50. Fry's locally has had routers and access points available at prices as low as $30 - $40 (if you use a rebate coupon, etc.) from time to time.