Bannka is just like Twitter, only that here photos take the place of tweets. It is as simple as that. The site features a (public) timeline with all the stills that people are sending out, and these images can then be reshared on other social sites like Twitter and Facebook. They can also be featured directly on your blog.
If you have either an iPhone or an Android phone, you will be able to use Bannka straight from it. Simply get the app from the relevant store and you will be good to go. And you will also be able to use Bannka from the Web. Granted, the process is more laborious since you have to get a Bannka mail, save it as a contact and send the picture you want shared as a MMS for it to be uploaded.
And just like Twitter, anything that you upload to the site can be set as private, and kept from the eyes of those who are outside of your close circle of friends.
Bannka.com In Their Own Words
Bannka – The Photo Timeline.
Why Bannka.com It Might Be A Killer
A photo can be taken and shared faster than what it takes to write and send a tweet.
Some Questions About Bannka.com
Will it catch on? Will people go for this as willingly as they go for Twitter? 
