This forum's topic is ADO.Net. However there are a lot of areas that deal with "Data Access and Storage" that are not ADO.Net. These are some categories and the places where questions about those categories are best asked.
Native data access components (ADO, Sql Native Client, MDAC, ODBC, OLEDB, JDBC, Sql Server Soap/Http)
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=87&SiteID=1
DataGrid, DataGridView, DataBinding and other data-related UI controls:
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=7&SiteID=1
General .Net UI controls questions (Textbox, etc)
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=8&SiteID=1
TableAdapter, Typed DataSet and related classes
http://social.msdn.microsoft.com/Forums/en-US/adodotnetdataset/threads
Transact SQL
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=85&SiteID=1