Apple has quietly released Bonjour Update 2010-001 via Software Update, saying only that "This update improves the reliability of connections between iTunes and Apple TV." Previously known as Rendezvous, Bonjour is Apple's implementation of the Zeroconf protocol for discovering network services. Oddly, Bonjour Update 2010-001 hasn't yet appeared on the Apple Support Downloads page. (Free, 959K)
Shorten URLs in TextExpander
If your Twitter client doesn't automatically shorten URLs for you, you can use TextExpander to shrink those long links to tweetable lengths. First, add the Internet Productivity group by choosing File > Add Predefined Group > Internet Productivity Snippets. Then, to shorten a URL using a service like TinyURL, copy the destination URL to the clipboard, and type the abbreviation
/tinyurl to insert the shortened URL at the insertion point.