Is there a TTL or expiration or some sort of timeout feature for C2DM messages?
I would like the C2DM message to be received within 10 minutes by the device, any longer (ie: if their phone is off) and the C2DM message should not be received by the device.
I could probably implement something in the device to ignore any C2DM messages if they are old, but I'm not sure how accurate that would be with different device time settings.
A TTL flag on the C2DM message sent to google would be perfect, but not sure if they support this.
Cheers! Dave