There are glowing worms showing up now in Moltera City. If you go to the lamp shop and refresh, he'll give you an empty lantern and then you can start picking them up. Don't know what you do with them from that point, but they're No Trade items, so there's something besides the cuteness factor.
Which is pretty high on the worms. They're adorable. =D
EDIT: One of the caves by the pool is now clickable. If you go there you get this message:
I've three worms so far, but none of them are working with my empty lantern. So far.It's much too dark in here to see! You'd better find an appropriate light source, otherwise you'd be doomed to spend your days stumbling in the dark.
Joy. More plot stuffs. I'd be happy if I trusted them not to stuff this one up as royally as they did the last chapter. x.x