The company has introduced a b/g and a/b/g pair of 400 mW mini-PCI cards: These are the form factor used inside laptops; to get this kind of signal performance previously, you'd have to go to a PC Card with a protruding antenna. The devices have a retail price of $109. I'll be curious to see if they become a stock item. They use Atheros chips for range.
The '400mW output power' claim is a tad misleading. An examination of the FCC test reports for the SR2 and SR5 shows that the 400mW is a 'peak' power measurement, while the more informative 'average' power measurement is 3-5 dB lower than 'peak'. Also, the SR2 and SR5 data sheets show that the max Tx power only applies to data rates </= 24Mbps. The power needs to be reduced as much as 5dB at the maximum 54Mbps data rate.