Over at Macworld, Jason Snell decodes the messages that appear in iTunes 10.5.1’s new iCloud Status column to explain each song’s status in your iCloud storage. follow link
Open a Finder Window with the App Switcher
If you don't have any Finder windows open and want to switch to the Finder and open a window in one fell swoop, bring up the app switcher with Command-Tab and tab over to the Finder icon. While still holding down Command, press the Option key, and then release the Command key. You're switched to the Finder, with a new default window open for you.
iCloud Status Messages for iTunes Match Decoded