I don’t think these services can replace Google Wave.
you can pulling all of them together, but they are different services, they are not waves.
You can create a new docement in google docs, but you can’t talk about it with coworkerss in place.
ps: google docs and groups are blocked in China, what a [profanity] times!!!
I wish google will bring us a new wave that usable an lightweight.
[Editor: profanity removed]