Links: SharePoint V3: Search: Style Sheets

Customizing Enterprise Search Results
http://msdn2.microsoft.com/en-us/library/ms550732.aspx

Enterprise Search Core Results XSLT Transformation
http://msdn2.microsoft.com/en-us/library/ms584121.aspx

How to: Change the Properties Returned in the Core Search Results
http://msdn2.microsoft.com/en-us/library/ms560074.aspx

How to: View and Edit the Search Results XSLT Transformation
http://msdn2.microsoft.com/en-us/library/ms544191.aspx

Sample: Search Core Results Web Part XSLT
http://msdn2.microsoft.com/en-us/library/ms562390.aspx