It went from 1.2.1 to 1.2.2. to (now) 1.2.3 in one day! Just fixing bugs and stuff I know. I'm a newb and updated without understanding it would prevent me from logging into YAMS. Since the Bukkit team has joined Mojang, I'm hopeful it won't be too long before I can log in again! (I can log in from my laptop, which I didn't update, but that's a pretty laggy experience.)
Question: Which of the added features will be available in YAMS? I understand we won't have jungle biomes because our biomes are already set. Will we have the new map height and all the other features?
Height depends on needs... for example it may come in handy when I want to build one of my community projects to start, such as an airship!

Or for example various events we have done in the past... even simple things like skydiving. but for the most part we havent needed it so far and we are not a skyscrapper creative server so yep lets wait and see. Jungle biomes will be available in mining world remember!

The only thing that will be a slight problem will be the cats as they wont transfer over the worlds
Yes but we have darrens pet shop soon...
@ Austin Try to take the . bin Folder from %appdata% In the Run and replace the 1.2.3 version with the 1.1 hope this helps
That will only work if he backed it up!