Comment: I know why I hated it... (Score 1) 350
Lack of control over your waves. Yes, it's supposed to be a collaborative environment. But you should still have control over who you collaborate with.
My team and I were using Wave to sketch out ideas for a project that we were working on. One of the team members invited someone else into the Wave - no big deal we thought, we tangentially knew the guy and he could contribute. But then he invited other people to the Wave (despite the warning we placed at the top of the Wave asking folks not to do that).
At that point, we tried to remove all these newcomers and found that we couldn't. We also discovered (well, knew already) that it was impossible to actually delete content from the Wave, because of its versioning capabilities.
So, our semi-private project had become public knowledge, and we had no way to get control back.
I understand that Google eventually did add the ability to manage Wave members