Learning ADO.NET
http://msdn2.microsoft.com/en-us/data/aa937699.aspx
Learning Microsoft Data Access Components (MDAC)
http://msdn2.microsoft.com/en-us/data/aa937703.aspx
Learning SQL Native Client
http://msdn2.microsoft.com/en-us/data/aa937705.aspx
Usage Scenarios for SQL Server 2005 Native Web Services
http://msdn2.microsoft.com/en-us/library/ms345140.aspx
How to Use the ODBC.NET Managed Provider in Visual Basic .NET and Connection Strings
http://support.microsoft.com/kb/310985/
How to Use the ODBC.NET Managed Provider in Visual C# .NET and Connection Strings
http://support.microsoft.com/kb/310988
SQL Server OLE DB Programmers Reference
http://msdn2.microsoft.com/en=gb/library/aa198360(SQL.80).aspx
ADO.NET: More than a Matter of ABCs "Connected and Disconnected Modes"
http://www.samspublishing.com/articles/article.asp?p=102202&seqNum=2&rl=1
Comparison of ADO.NET and ADO
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbconADOPreviousVersionsOfADO.asp