TweetPhoto is a new photo sharing service on Twitter. While I have used Twitpic for some time, this looks like it adds some great enhancements.
# Upload photos by email, mobile or web
# See who viewed any photo
# Favorite or retweet any photo
# Photos are automatically geo-tagged
# Filter photos by Twitter or Facebook friends
# Automatically publish photos to Facebook
# Search photos and see trending tags
You do log in with your Twitter username and password. From there the capabilities impressed me. There is Facebook Connect, pic.gd URL shortening, photo manipulation and more.
I think I found a new favorite.