As mentioned above, there's really no need for that. XMPP which Wave is based on has no problem handling multi-user collaboration where users are not contacts of one another. So there's nothing to get around, Wave should already have this ability built in.Yes, but I imagine people will find a way to get around that. How about separate address books for separate places?
Seems as if people are creating their own limitations for Wave just based on a video they saw, which certainly didn't expose all of it's capabilities.
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