What to write about Flickr, the "King" of the web2.0? There has been more than 11mio articles in the blogosphere so far and it doesn’t tear off. But let me try summing up what lots of geeks did before.

Flickr is THE platform to upload, search, sort and share photos of all types. Flickr is a community of lurkers - am´s and pro´s - all interested in photos and all interested in sharing them. Consequently Flickr is a masterpiece of what we proclaim as web2.0 today, it’s the seed of a fast growing tendril presenting the beginning of a new era of the social world wide web.

Flickr not only has the most user generated content, it also implemented the methodology of tagging as almost no one else. Flickr set the standard when it comes to creating a logo or dub a promising startup. Lots of startups copied the ending with an “r” after an consonant. Additionally, loads of services around Flickr even have that ending like splashr.com a tool showing Flickr pictures in a certain way orgickr.com , a tool that automatically creates animated gifs out of Flickr pics, mappr.com. A helpful list is flickrbits.com, a substantial collection of all Flickr related application and services.But how did the founders start the impressive tool in summer 2005? More by chance than real planning. Marketing expert Caterina Fake and her husband and webdesigner Stewart Butterfield created the platform to simplify sharing photos among their friends.

A year later they sold it to yahoo for almost 50mio US$ which was the start for a couple of acquisitions the big five made during the last two years.Consequently, Flickr makes all web2.0 relevant game mechanics available to its users. With its remarkable traffic Flickr ranks on place 42 in the WorldWideWeb. Therefore, Flickr has become the king of spade which categorizes the entertainment section of our web2.0 poker game.