Social Networking Apps

• TwitBird Pro for Twitter ($4.99):  This is a full-feature Twitter app, which is now my main Twitter app. Supports multiple accounts, emojis, photos, Address Book, music, shrink url, Facebook, and more.
• TweetDeck for iPad (free): Can have multiple columns for friends, direct messages, favorites, etc.  Will not show a pic directly, but opens pic in a viewer.
• Twittelator for iPad ($4.99):  Can email links in a tweet and send to Instapaper; missing Favorites but can "favorite," shows pics directly in list of tweets (why I like this app), saves draft tweets; post pics and audios.
• TweetTime ($0.99):  Supports multiple accounts, shows count of new tweets, shows Favorites, follow/unfollow, block/unblock and more.
• Osfoora HD, for Twitter ($3.99):  Supports multiple accounts, tweet pics and songs, manage timeline, mentions, favorites, lists, saved searches; full management of your account; view your conversations with others; change font size; email links and send to Instapaper; integrates with Boxcar for push notification;best Twitter app I have found.
• Boxcar (free):  Push notification for Twitter, Facebook, email, RSS, Atom, and Growl.  I put this app on my home (1st) screen so I can quickly know if I have any new tweets.
• Mashable for iPad (free):  RSS feeds for thewww.mashable.com social networking news site.