Slowly but surely, Google Wave is building out the expected features that people want.  They’re still missing some huge ones (publish to a site, print, rearrange blips, etc), but they’re getting there.

The latest two they’ve added are User Access Permissions and Restore from Playback.

User Access Permissions

This allows you to add people to a Wave with read-only access.  One neat thing you can do is allow public read-only access to the Wave to show it off to a wide variety of people without worrying about them messing it up.

You can make groups or individuals read-only.  Coming soon will be “reply only” access which allows users to reply to blips but not edit the blips that they didn’t create.

Restore from Playback

If a Wave gets messed up, anyone with full access to the Wave can restore it to a previous point.  This “restore” actually becomes a new instance at the end of the playback history, so others could essentially un-restore it if necessary.

What do you think is the biggest issue that needs to be addressed next?