1. A Wave URL looks like this: https://wave.google.com/wave/?pli=1#restored:wave:googlewave.com!w%252B12345abcd-E (or, after multiple reloads: https://wave.google.com/wave/?pli=1#restored:wave:googlewave.com!w%252B12345abcd-E.4 … where it appears that the trailing “.4” is number of times the wave was accessed during this session)

2. Remove everything except googlewave.com!w%252B12345abcd-E

3. Change the part after the exclamation mark from w%252B to w+

4. Your Wave ID is: googlewave.com!w+12345abcd-E

[wave id=”googlewave.com!w+BatkTKKBA”]