LIGHTHOUSE IS OPEN!!!!!
WARNING: The Lighthouse is OPEN!!! The Entrance (top diagram) has a HUGE SIGN... GRAND OPENING! The 1st Floor(bottom diagram) has a flight of stairs and guess what? The Band is playing (you can see that Frankie isn't there with his banjo)!!! On the 2nd floor(AKA Beacon; very bottom diagram), you can get the Sailor's Hat, and also, click on the telescope. You get to look right through it.
UPDATE: Billybob has just announced some info on the Lighthouse.
Here is what he said: Hello Penguins! As you can see, there are some great parties going on in the lighthouse! I hope you're all enjoying it! There are a few strange things in the top of the lighthouse and I can't tell you very much right now, but I'll tell you what I can...The "coming soon" sign is pretty mysterious, but you won't have to wait long to find out what it is. More details will be revealed next week. As for the telescope, you might be able to see something in the coming weeks, so keep checking it every once in a while. That's all I can say for now.
UPDATE: The Lighthouse party has ended. Sorry to those of you who missed it...