Yes! The "weather" is finally here...
Notch has issued beta 1.5 to Minecraft players throughout the world.
One of the most anticipated features was weather, but it's been very uncommon in most biomes. I haven't encountered it, along with many others. It IS there though, I have seen proof!
I was looking forward to some thunderstorms as well, they are supposedly very dynamic! At least the awesomely epic achievements make up for it!
The achievements feature was a great idea, if I do say so myself. They are situated in the pause menu, and when you select it, it brings up a kind of spider-diagram type menu, where all the achievements are stated. When you hover your mouse over an unlocked achievement, it gives you intructions on how to complete it. Which is why they also act as a kind of tutorial for new players.
NOTE: The "ladder every second block" trick has been removed :(
Also, there is some stability and performance issues that have been patched.