Enables a webpart and a ribbon button that allows you to retrieve the information recorded in the ULS log tagged with a specific correlation ID.
This makes it much easier for SharePoint developers to retrieve the log messages for a specific correlation token.
More information regarding correlation Id's in SharePoint 2010:
http://sharepoint.microsoft.com/Blogs/G … spx?ID=353
http://www.zimmergren.net/archive/2010/ … -2010.aspx