It is becoming common for users of Twitter to associate images with their “tweets”. The two services used most frequently are TwitPic and Twitxr. Images can be uploaded from a desktop machine, but the intended purpose is for people to send images from their cell phones or other mobile devices. From a phone, one can e-mail the image to the service and that generates a Twitter message, which includes a link to the image. It is also possible to look at the service’s website directly and see all of a user’s images with their associated messages.
Twitpic requires a Twitter account and the functionality is currently limited to posting through Twitter. Twitxr is a social networking site in itself, in that you can have “friends” and “follow” other users. You can also specify locations for each image and then view maps that display where all of the recent images were posted. Twitxr also allows users to send images to Facebook and Flickr, in addition to Twitter.