What ever happened to the hippie couple from "1969"?
We never hear about them again. Presumably, at least Jenny is still alive, if not Michael. She could have easily been pregnant. Their kid would be 39 in season 1. That kid could have joined the Air Force and ended up assigned to the SGC. It's not super likely, but growing up with parents who met aliens might push the kid in that sort of direction. Also, that would be very SG1.
I wanted their kid to be Major Davis, but google says his canon birth month is July, and the episode takes place in August. That would have been so cool, and it could explain why he's such a cool character. I feel like he probably would have mentioned it at some point after the episode took place, though.
I would have liked a follow up on them, and it would be cool if they had a kid who joined the SGC or something.