Thunderbolt has been largely theoretical so far, but with the first peripherals lining up for release in the near future, this Ars Technica article is a particularly interesting read. It claims that, at least at first, Thunderbolt peripherals won’t ship with the necessary cables, and users will have to buy Thunderbolt cables from Apple for $49 for a 2 meter cable. At some point, other manufacturers will undoubtedly start manufacturing Thunderbolt cables, which will likely drive the price down, but it’s unclear how long that will take. follow link
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.
Initial Thunderbolt Cables to Cost $49 from Apple