This SQL will show you progress of an ongoing database restore.  This is useful if you've either scripted the restore and can't see UI events, or the restore is attached to an SPID that's not yours.

SELECT r.session_id,r.command,CONVERT(NUMERIC(6,2),r.percent_complete)

AS [Percent Complete],CONVERT(VARCHAR(20),DATEADD(ms,r.estimated_completion_time,GetDate()),20) AS [ETA Completion Time],

CONVERT(NUMERIC(10,2),r.total_elapsed_time/1000.0/60.0) AS [Elapsed Min],

CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0) AS [ETA Min],

CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0/60.0) AS [ETA Hours],

CONVERT(VARCHAR(1000),(SELECT SUBSTRING(text,r.statement_start_offset/2,

CASE WHEN r.statement_end_offset = -1 THEN 1000 ELSE (r.statement_end_offset-r.statement_start_offset)/2 END)

FROM sys.dm_exec_sql_text(sql_handle)))

FROM sys.dm_exec_requests r WHERE command IN ('RESTORE DATABASE','BACKUP DATABASE')