If you're talking about stained glass, they are trying to fix the lag issue caused by using it first. It's the same reason we don't have fireworks and a few other things. Music discs will most likely be added in 1.2 as that's when we're supposed to be getting the parrots.
Plz add new things in Minecraft such as glass panes, music CDs as while making redstone circuits I get bored.
If you're talking about stained glass, they are trying to fix the lag issue caused by using it first. It's the same reason we don't have fireworks and a few other things. Music discs will most likely be added in 1.2 as that's when we're supposed to be getting the parrots.