The 'Tiger stripe' camouflage uniform O'Neill wears during his mission in Central America is the same one worn by the alternate universe SG-1 in Season 1's There But for the Grace of God (1998).
The device Daniel goes looking for is suspected to have the potential to heal and may be the source of the fountain of youth myth. The lead antagonist is called Rafael which is a name of Hebrew origin meaning 'God has healed'.