Blogs
I.M. Wright’s “Hard Code”: http://blogs.msdn.com/b/eric_brechner
Scott Hanselman’s blog: http://www.hanselman.com/blog/
Eric Lippert’s blog: http://blogs.msdn.com/ericlippert/default.aspx
David Ebb: http://blogs.msdn.com/davidebb/default.aspx
C# FAQ Blog: http://blogs.msdn.com/csharpfaq/default.aspx
MS Certification: http://blogs.msdn.com/gerryo/
Steve Marx (Azure): http://blog.smarx.com/
CodeFu Guru: http://www.kodefuguru.com/
Critical Development: blog about a lot of different topics: http://dvanderboom.wordpress.com/
Journey To SQL Authority: http://blog.sqlauthority.com/
Coding Horror (Jeff Atwood): http://www.codinghorror.com/blog/
You’ve been HAAKD: http://haacked.com/
John Skeet: http://msmvps.com/blogs/jon_skeet/default.aspx
Vance Morrison (very low traffic, more of a perf reference site than a blog): http://blogs.msdn.com/b/vancem/
.NET Development
Hundreds of code samples in one zip file covering nearly all MS technologies:
http://1code.codeplex.com/
An Extensive Examination of Data Structures Using C# 2.0 (lots of good computer sciencey stuff)
http://msdn.microsoft.com/en-us/library/ms364091(v=VS.80).aspx
.NET Best Practices:
http://www.c-sharpcorner.com/Articles/ArticleListing.aspx?SectionID=1&SubSectionID=68
ASP.NET
Tons of info about ASP.NET
http://www.asp.net/
ADO.NET aka WCF Data Services:
http://msdn.microsoft.com/en-us/data/ee720180.aspx
Introduction to Building WCF Services: (seem pretty good for MSDN content 
)
http://msdn.microsoft.com/en-us/library/aa480190.aspx
Scott Hanselman’s Interview Questions:
http://www.hanselman.com/blog/WhatGreatNETDevelopersOughtToKnowMoreNETInterviewQuestions.aspx
http://www.hanselman.com/blog/ASPNETInterviewQuestions.aspx
Microsoft Certification Official Blog (has occasional free classes and such)
http://blogs.msdn.com/gerryo/
Free C# Site w/ lots of articles:
http://en.csharp-online.net/CSharp_Certification%2C_Development%2C_and_Training
Azure
Azure team blog:
http://blogs.msdn.com/b/windowsazure/
Azure blog aggregator sites:
http://www.azurejournal.com/
http://azurefeeds.com/
If you want to learn about Azure, here are some starting points:
http://blogs.msdn.com/billzack/archive/2010/03/13/windows-azure-platform-training-roadmap.aspx
Steve Marx talks about Azure a lot:
http://blog.smarx.com/
Not everything is about Azure, but there are number of good posts about various Azure-related topics:
http://blogs.msdn.com/brunoterkaly/default.aspx
SQL
Good stuff. Grammar is a bit shaky since the guy is from India but lots of useful information on his site:
http://blog.sqlauthority.com/
