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
View Extra Audio Details in Snow Leopard
In Snow Leopard, Option-clicking the Volume icon in the menu bar displays a list of sound input and output devices. Choose one to switch to it; it's much easier than using the Sound preference pane. Also, hold Shift and click the icon to set the system volume, which is separate from the general output volume.
Upgrading to Lion at an Apple Store
Check out the Take Control ebooks that expand on the topic in this article: