The ReSharper coding styles can be exported and imported by ReSharper - Options - Common - Code Style Sharing - Import/Export. (Code inspection severities are said not to be supported by this feature yet.)
This will create a file next to the Solution called project.4.1.resharper. The file has to be added to the source control.
For details on sharing across the team with TFS see the posting from Michel Grootjans: http://geekswithblogs.net/alternativedotnet/archive/2008/10/20/125936.aspx