With the help of stcupp we can now supply unconfirmed notifications

For now this only works with regular orders, ie. not one-shot API.
You simply select 0 from the dropdown...
Unconfirmed events are attempted for delivery every 10seconds for 5 minutes, after that no more attempts are made.
Regular events 1-n are now attempted every 2 minutes for 24hours.
So you may wish to register for unconfirmed events to show "Payment received" to customer, and then 1-6confirmations before shipping the items/downloads/keys/etc.
This is ofcause beta, please report any bugs, missed events, etc.
For HTTP POST API confirmations is set to 0 for unconfirmed, and block to -1.
In other news : A bug with block number has been fixed, previously we were sending blockID, not the blockHeight.