The current status of:

I'm asking for some good projects without news in a time:

Alice Dreams
DCastle
Age of the Beast

Anybody can say more?

José Manuel

Alice Dreams should be on the DDD whenever it comes out.
DCastle just had an update a month or two ago.
Age of the Beast is still slated for release in about a year or possibly two. More info on it can be found at Senile's forums.

What does DDD mean talking about AliceDreams?

DreamcastDemoDisc (i think)

Yes, I guess it'll contain some nice surprises ;D

:o I can believe AOTB still takes that long...

When can we expect this DDC?

Freeze, I think is about the only one that can tell us when to expect the Dreamcast Demo Disc. It's been in planning for quite a while, but I thought it was something that was going to be coming out shortly. patbier supposedly got a version of Alice Dreams ready for it some time in November.