I just realized I didn't really announce this in any 'official' capacity, but:
Roads and Bridges have been added to the game!
Roads and bridges can be found in their own tab on the central 'Build' menu, and come in two flavors. You can build stone roads, which let your Peabs move slightly faster, or if you're flush with resources you can splurge on Steel roads, which improve walk-speed even further.
These features come with a side of improved pathfinding algorithms, so the whole game runs faster when you have worlds with 100+ citizens.
Cheers!