As it looks like 1.8 is drawing close, I'd like to take this opportunity to submit a proposal for the Central Nether Terminal for TWHL Town 1.8.
This layout was designed to allow for 'local' access to the nether and overworld, through the lower tunnels, while long distance travel is gained via the upper tunnels, where, in each of the four compass directions, there is space for a 5 man CARTS terminal. For best results, both visually and functionally, all portal should be placed so, when standing in the portal, we're standing on Y:8.