TwitPic has released an iPhone application for iPhone that’s currently available in the iTunes App Store for free. You can also add your own effect to pictures that you want to share.

• Quickly and seamlessly share your photos and videos with all of your Twitter followers
• Edit your photos with beautiful filters and easy to use enhancement tools
• Browse your Twitter photo timeline with photos from people you follow in a beautiful interface
• Browse photos from the most popular Twitpic users
• Manage your Twitpic photos and videos in your own timeline