So I've got all 16 puzzles, all tech and am wandering around aimlessly...is there more to do, or is that it???

Virtual Villagers, like all of our real-time games, is designed to be open-ended. Each game has clear goals, but the games can continue to go on and allow you to play as long as you like.

There has been a lot of good discussion about that topic in the forums. Here are links to some of the threads:

look here
and here
and here
and here

Thank you for the info