I am pleased to report that the brick barrier in my ocean has been effective in stopping the Creeping Hallow from taking over again. That chunk off the edge of the screen is still Hallow, but the rest is normal ocean, so I can use my pirate map farm normally.
I got a gold frog
I was flying past the jungle, cruising low looking for strange plants, and noticed that my lifeform analyzer said "gold frog". So I found and caught it. Now I just need a gold mouse to have a full set.
Generated my first expert worlds today. Two of them, one Crimson and one Corruption. Fought the Eye, the Eater, and spawned the mechanical bosses in the corruption world. Need to go fight the brain in the Crimson. Methinks Duke Fishron and the Moon Lord are definitely going to be two-person kills in expert... They're bad enough just in normal mode XP My world seems to default to Corruption when generating new worlds... It took me three tries to get a Crimson world.
I will be farming the Golem in one of those worlds to get the developer sets, since Golem is probably the easiest of the hardmode bosses.
Have to go kill the Wall of Flesh a few times to get the new summoner emblem.