Anyone ever read Dream Saga? I picked it up a few weeks ago (thanks to seeing Gypsy's stationary ^_-) and I thought it was really good.
It is about a girl who finds a magic stone and meets this other girl through a mirror telling her she needs to help save this other place. She goes to this other world when she falls asleep and there finds that she is the legendary girl. Everyone becomes someone else when they go into their dream world and she meets people she knows in real life there. I am only on the 2nd volume so I can't say more, but it is good! Read! It is by the same person who did Saint Tail ^^