One option to consider when rebuilding indexes for defragmentation purposes is the WITH DROP_EXISTING option. You can read more about it at the following URL (2005 version)...
http://technet.microsoft.com/en-us/library/ms188783(v=sql.90).aspx
Once that page is up, do a page search for "DROP_EXISTING Clause" (without the quotes) for more information.
--Jeff Moden
Change is inevitable... Change for the better is not.