Twitter, Google+, and Facebook are one step closer to becoming clones of each other (at least when it comes to photo sharing) — Twitter has rolled out photo galleries that display the 100 most recent images Tweeted by users in chronological order.
The images included in user galleries can come from Twitter, yFrog, TwitPic, Instagram and other image sharing services supported in Twitter’s details pane. [#]
To view a user’s gallery, simply visit their Twitter page and click the thumbnails on the sidebar.
Clicking an image in the gallery brings up a higher resolution version (screenshot is of Trey Ratcliff’s gallery):
If you don’t see the galleries yet, it’ll probably be rolled out to you within the next day.