Thanks to Macgasm for pointing out that Apple is now giving away free DVD copies of Mac OS X 10.6 Snow Leopard to MobileMe users still running on 10.5 Leopard. This is to aid those users in making the jump to 10.7 Lion (which must still be purchased from the Mac App Store for $29.99) and thus iCloud before MobileMe’s 30 June 2012 shutoff date. Of course, a copy of Snow Leopard won’t help those still using PowerPC-based Macs, which can’t upgrade past Leopard, but if you’ve simply been dragging your feet, this is a nice enticement to make the switch.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.
Free Copy of Snow Leopard for Leopard-Using MobileMe Holdouts