Shared

Google Reader Shared - - shared articles, news
FriendFeed - - contains aggregated items from Google Reader Shared, Twitter, Reddit...
Corporate - - meaningful articles and information concerning work in corporations and organizations
Geek to Live - - tips for computers and technology, interesting software and services
Pirates - - articles concerning sharing, copyright and pirates

Professional

SPScriptingConsole - open source console for running IronPython scripts on  SharePoint sites

Other websites

cesky.reddit.com - selection of articles in Czech on reddit

Memeoir - collection of psychedelic memes - soon on its own site

Archetypal - Czech translations of remarkable texts - soon on its own site

Music

Original music - electronic music - downtempo, psytrance
DJ sets - beatless ambient, psychedelic trance