There is a rather unique way of finding images on Flickr. It is provided by FivePrime and is called Hive Mind.
I have started to use this as a means of finding the very best examples of a subject, style, or tool.
Here are links to semi-random subjects. Each page is sorted by Flickr's "Interstingness" property.
qtpfsgui - an Open Source HDR application
texture layers - a technique of image manipulation that I particularly like
Canon 5D MkII - a look at "interestingness" from the point of view of specific camera equipment
This is a brilliant way of swiftly reviewing the very best work to be found across the Flickr universe. If you ever wonder what the state of the art is, just take a look using this image filtering tool. You might be utterly and pleasantly shocked, just as I am.