If you can't host any of these maps, how about you make the save files public? It's quite easy, just go to: C: > Program Files > Blockland > saves > [Map Name] > [Save File Name], and then upload that file to an internet file hosting service.
Mediafire is the one most people use, but if you know of another equally reliable service that's fine too. Just make sure to sign the map, whether in the Map Description feild of the save file or with Print Bricks on the map. This way we can all play your maps without having to wait for your dad to get around to forwarding your ports.
Alternately, if you want to wait untill you can host these maps, just remember: it's good manners to release the save file for an DM after you're done hosting it. This way people who wanted to play, but wern't able to, can still enjoy your maps long after you've moved on to bigger and better DM builds.