Shared by Mystech
For anyone else that has information on Wave that they’d like to preserve.
You may or may not continue using Wave as an open-source “box,”, but if you want to archive any important conversations you’ve had in it, you can now export a Wave into HTML or ZIP files, attachments included.
To grab your Wave, open it up, then look for the “Export” button on the right side of the top toolbar—it may be tucked under an “…” button. Right now, it’s a Wave-by-Wave basis, but the developers say they’re working on means of exporting bulk Waves, as well as transferring them into Google Docs.