[dandare]

Just came here to say that Diaspora by Gregg Egan is my #1 book ever :)

[aethertron]

It's up there for me. But I liked his Schild's Ladder, which plays with some of the same ideas, even more.

[gilbetron]

I literally was telling a friend about how the one group needed to warn the group on earth about the danger (keeping things vague deliberately!) and how they had to quickly "evolve" different entities to be able to communicate with the earth beings.

Also the different time scale awareness concept.

Such great ideas!