Another problem with doing it using a permanent table, whether in TempDB or some other database, is the chance of a naming conflict. You could go through some gyrations to resolve such conflicts by including a DATETIME stamp in the name of the table, but I think it might be easier just to populate a single permanent table and delete only those rows that are no longer necessary using a "BatchID" or other form of row identification.
--Jeff Moden
Change is inevitable... Change for the better is not.