[tompko]

These are quite different circumstances though. Bethesda were trying to apply their trademark in an overly broad way to an unconnected game, whereas the makers on your site are using Mojang's exact trademark to sell unlicensed goods based directly on their product. Had Bethesda actually taken Mojang to court it was debatable which way the case would go, although on balance most opinions I saw went with Mojang. In this case it's very much more clear cut.

[etjossem]

It's also different from the Scrolls situation in that Goodsmiths isn't trying to claim the right to use the Minecraft trademark. They'd clearly prefer to put the crafters in touch with Mojang and set up some license deals to make things right, rather than doing a complete takedown. But if the two sides can't reach an agreement, they've already said they're going to deactivate the listings.

The way I see it, the challenge is harmless fun with no actual legal implications. Notch should totally take them up on it.