Blog Group 1 (Microsoft Data Mining and Business Intelligence)
Aurelien Koppel~ La Business Intelligence
BI Thoughts and Theories (John Welch)
BIpartisan (John Welch)
Blogs - Dougbert.com (Douglas Laudenschlager)
Boon Blog (Sean Boon)
Brent Ozar - Too Much Information
Carlos Bossy - Business Intelligence, Data Architecture and SQL Server
Chris Webb's BI Blog - Windows Live
Dan English's BI Blog - Windows Live
Darren Gosbell [MVP] - Random Procrastination
Data Mining with SQL Server 2008 ~ The Book's Blog
Data Platform Insider, Official news for Microsoft's Data Platform
Denny Lee
DM(X) (Bogdan Crivat)
Donald Farmer~ Foraging in the Data Forest - BeyeBLOGS.com - The Business Intelligence Blog Community
fjehl.blogspot.com (François Jehl)
Greg Gonzalez
Jamie's Junk (Jamie MacLennan)
Jen's Blog (Jen Stirrup)
Jessica M. Moss
Kirk Haselden's Kirkapedia
Microsoft Excel 2010
Microsoft SQL Server Development Customer Advisory Team
Nick Barclay~ BI-Lingual
PowerPivotPro (Rob Collie)
Prologika (Teo Lachev's Weblog) - Prologika Forums
Reed's space (Reed Jacobson)
Richard Lees on BI
Robert Bruckner's Advanced Reporting Services Blog
SharePoint Business Intelligence
SQL Business Intelligence Professional (Barry Ralston)
SQL Server BI Blog (Paul Turley)
SQL Server Performance
SQL Server Reporting Services Team Blog
SQLBI - Marco Russo
SSIS Junkie (Jamie Thomson)
SSIS Team Blog
THE BI Blog
Thomas Ivarsson - Microsoft BI & Analytics - Windows Live
Tomislav Piasevoli - BI Blog - Windows Live
Vidas Matelis SQL Analysis Services 2005~2008 blog + other Microsoft BI technologies (SQL, SSIS, SSRS).
Working with Data, Databases, Data Mining (Microsoft .NET user group Vinnytsia)
Blog Group 2 (Microsoft Evangelists)
Bloggercoaster (Joel Reyes)
BrustBlog (Andrew Brust)
Chad Brooks Web Log
Contagious Curiosity (Lynn Langit)
DevFish.Net (Joe Healy)
Gold Coast - Windows Live (Marc Schweigert)
Jeff Blankenburg ~ Blankenthoughts
Jennifer Marsman
Joe Cleaver's Blog
John McClelland's Blog
Ken Jones
Pla.NET Southeast! (Glen Gordon)
Robert Shelton's Blog
Structure Too Big (Brian Hitney)
Blog Group 3 (Data Mining)
CoolData blog (Kevin MacDonnell)
Data Miners Blog (Gordon Linoff and Michael Berry)
Data Mining and Predictive Analytics (Dean Abbott)
Data Mining~ Text Mining, Visualization and Social Media (Matthew Hurst)
DECISION STATS (Ajay Ohri)
Geeking with Greg (Greg Linden)
Life Analytics (Themos Kalafatis)
Matt Cutts~ Gadgets, Google, and SEO
The Text Frontier - Text mining, voice mining and unstructured data analysis