Microsoft has released Skype 6.7, which completely overhauls the telephony app’s search feature. Now you can enter a term into the toolbar’s search field, and it will bring up a list of relevant conversations, as well as enabling you to explore your entire conversation history. A number of issues have also been resolved, including Skype hanging when closing the application during a call, being unable to hang up a call with the keyboard shortcut, and duplicate messages to Facebook contacts. There is an existing known issue with Mac OS X 10.7 Lion where the app sometimes crashes when clicking on profile pictures or file transfer icons. If Skype’s automatic update feature hasn’t yet gotten you the new version, choose Skype > Check for Updates, or download a copy from Skype’s Web site. (Free, 40.6 MB, release notes)
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.