Came across another Flickr mashup called FlickrRiver. Not sure if it can be called a mashup, as it doesn’t really mix two or more web services. It’s just an alternate viewer for pictures hosted on Flickr.

Features

* Photos displayed on a black or a white background. FlickRiver claims that pictures seem better when displayed on a black background.
* Photos are displayed in a one continuous stream, one above the other (like a river). I found this really boring at first as I had to scroll down all the time, until I realised there is a simpler keyboard navigation.