They should be good articles. They're taking the RSS feeds from all the best blogs and posting them up without attribution and frequently without links. It looks like this place is posting a lot of great content, but they're just aggregating others. Last I heard, they were taken offline pending some adjustment to their methodology.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning