Twitter has realized that mobile is the place to be and has been pushing out mobile clients to all the major platforms over the course of this year. Twitter launched its Twitter for BlackBerry app as a private beta in February and rolled out the official app in July. Unlike the other mobile platforms which were developed by Twitter independently (Android) or via acquisition (iPhone), the Twitter for BlackBerry app was developed in conjunction with RIM. Soon there after, Twitter took on the Android powerhouses of Twydroid and Seesmic when it launched the official Twitter for Android back in April of this year. Last but not least, it acquired Tweetie and rolled out the official Twitter for iPhone in May. INTOMOBILE

When you walk into a cafe and note the numerous iPhone-toting denizens with telltale white earbuds firmly embedded in their ears, do you wonder what they’re listening to? If so, Frimby’s new music discovery and sharing app for iOS, SongStumblr, could help you find out. Recently updated to 2.0, SongStumblr uses your iPhone’s 3G and Bluetooth abilities to let you see what others are listening to around the world as well as around the block.
You begin using SongStumblr by setting up a user profile with basic information about yourself and your location. When you play music either through SongStumblr’s built-in player, or with the regular iPhone player with SongStumblr running in the background, your selection is added to your user profile for others to see. PCWORLD