Historia de Flickr

Wikipedia (inglés):
Flickr was developed by Ludicorp, a Vancouver, Canada-based company founded in 2002. Ludicorp launched Flickr in February 2004. The service emerged out of tools originally created for Ludicorp's Game Neverending, a web-based massively multiplayer online game. Flickr proved a more feasible project and ultimately Game Neverending was shelved.
Early incarnations of Flickr focused on a multiuser chat room called FlickrLive with real-time photo exchange capabilities. There was also an emphasis on collecting images found on the web rather than photographs taken by users. The successive evolutions focused more on the uploading and filing backend for individual users and the chat room was buried in the site map. It was eventually dropped as Flickr's back end systems evolved away from the Game Neverending's codebase.
Some of the key features of Flickr not initially present were tags, interestingness, marking photos as favorites, and group photo pools.
In March 2005, Yahoo! Inc. acquired Ludicorp and Flickr. During the week of June 28 all content was migrated from servers in Canada to servers in the United States, resulting in all data being subject to United States federal law.[1]
On May 16, 2006 Flickr updated its services from Beta to "Gamma" along with a design and structural overhaul. According to the site's FAQ, the term "Gamma", rarely used in software development, is intended to be tongue-in-cheek to indicate that the service is always being tested by its users, and is in a state of perpetual improvement[2]. For all intents and purposes, the current service is considered a stable release.
On December 29th, 2006 the upload limits on free accounts were increased to 100Mb a month (from 20Mb) and removed from Pro Accounts, permitting unlimited uploads for holders of these accounts (up from 2Gb per month).