Notch has released a video of the pistons that'll feature in Minecraft update 1.7, aka the Adventure Update. I'm well aware that this only barely scrapes into the category of "news", but then I realised how easy it would be to come up with a headline pun and that was that.
Besides, after watching this video I'm now convinced that I (finally) want to start fannying around with elaborate redstone circuity. Just look at this.
2:40 is the good bit. Also, the cow abuse at 4:00 reassures me. If the boys at Mojang aren't immune to the temptation of giving the odd cow a slap, there's surely hope for the rest of us.