Currently the API only sends modified time.
Some developers would benefit from creation time.
See discussion:
https://wave.google.com/wave/waveref/googlewave.com/w+odZFQmdrA
Original issue reported on code.google.com by pamela.fox on 25 Jun 2010 at 7:32
Original issue reported on code.google.com by
pamela.fox
on 25 Jun 2010 at 7:32