A raft of new Twitterrific features lurk in the new Sources screen, accessible from the timeline by tapping the back button in the top-left corner of the toolbar. From this top-level screen you can access powerful new settings, several different timelines, see what people are talking about, and find what you're looking for.

Support for multiple Twitter accounts is one of the biggest additions to this version of Twitterrific. I've been using Twitterrific 2.0 to check the @macworld Twitter account as well as my own personal account, aided by the fact that you can configure what displays in the timeline of each individual account. In the case of Macworld's account, I'm not as concerned with following other people as I am with seeing tweets that mention Macworld--so I've configured Twitterrific to display only mentions in that timeline. On my personal account, I've set it to display everything--my friends' tweets, my tweets, all my mentions, and even direct messages--in my timeline.

The Sources screen also gives you access to Twitter's powerful search engine, all from within the comforting Twitterrific app interface. If you Tap on Quick Search you'll get a search query field that lets you specify what words, people, or even places to search for. If you perform a certain search often, you can save the search and go back to it whenever you want. The app comes with two searches saved by default: one looks for nearby tweets, based on your current location; the other is a demonstration search for Twitterrific itself.

At the bottom of the Sources screen is a list of the current top trends on Twitter--in other words, a list of what people are talking about right now. Tap on any of the phrases and Twitterrific will show you the latest tweets that mention the key phrase.