Over at Macworld, Glenn Fleishman recounts what it was like to upgrade to Lion at an Apple Store, something that people without sufficient bandwidth might consider doing. The moral of the story? Bring an iPad or a book and plan to spend a few hours at the task. 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.
Upgrading to Lion at an Apple Store
Check out the Take Control ebooks that expand on the topic in this article: