It's rare to see a technology that's been ostensibly pass by rise from the death, but 802.11a has some life in it yet: I've always been interested in 802.11a because, despite its lower signal propagation potential up in the 5 GHz band, it has had many more channels available for wireless networking from its first days, with more to come as more 5 GHz band is made fully available for unlicensed use. Because enterprises are more likely to have collections of heavy users, a dense infrastructure is more likely to be needed, making the shorter potential range of 802.11a less of an issue.
Thus it's a surprise to see Linksys introduce dual-band 802.11a/g gateways intended for the home market. But they see the future of home entertainment including streaming media that uses 802.11a--in line with Sony's early devices.
The 802.11a/g (Wireless A+G) equipment will ship in October at pretty low list prices: $89 for a PC or PCI adapter; $99 for a USB adapter; and $109 for a gateway/router.
Update: Tim Higgins of Tom's Networking wrote in to note that Linksys has been selling A+G access points since April 2003--he wonders whether this is just a promotional re-launch instead of new product. I have a query into Linksys asking if there is any difference with these "new" devices.