iTunes Keyboard Shortcuts
Trained by years of NetNewsWire usage, I find myself continually ⌘-tabbing into iTunes and hitting ⇧-⌘-R to manually refresh the Podcasts listing. Of course, this does nothing as ⇧-⌘-R is a meaningless key combination in iTunes.
Frustrated with this state of affairs, I went searching for the actual ‘Refresh Podcasts’ keyboard shortcut. I found it listed in the iTunes for Windows 7.1 Help: Keyboard shortcuts document on Apple’s site. If you hit F5 while the Podcasts listing is visible, iTunes for Windows will happily refresh it.
Having found what I was looking for, I ⌘-tabbed back into iTunes and made use of my F5 key. Or, at least, I tried to. In my Mac OS version of iTunes, F5 is just as meaningless as ⇧-⌘-R. A brief bit of searching provided me with the iTunes Mac 7.1 Help: Keyboard shortcuts, which clearly lists the Mac keyboard shortcut for refreshing podcasts as non-existent. (Actually, it doesn’t list it at all since that page doesnt list non-existent shortcuts.)
In short, while Windows users can refresh their podcasts with the F5 key, Mac users have to use the mouse.

Can you make a custom shortcut in quicksilver?
Save this AppleScript in your scripts folder:
– tell application “iTunes” activate updateAllPodcasts
end tell
Launch it with Quicksilver.
Open Quicksilver’s preferences.
Select ‘Triggers’.
Click the ‘+’ and select ‘HotKey’.
Click ‘Save’.
Click the little button in the command column for your new custom item.
Click the ‘Hot Key:’ field in the drawer.
Type ‘⇧-⌘-R’ (or F5 or whatever)
Click the ‘Scope’ tab in the drawer.
Select ‘Enabled in select applications’
Type ‘iTunes’ in the field below.
Smile a Mac user smile.