If your reservation number is greater than the reservation number listed below, please post the 1) reservation number 2) region and 3) type: Signature or General Production.
Here is an updated collection of the numbers posted by members on various threads (i.e., these numbers are to be taken with a grain of salt):
US
S 282 (April 29, 2011)
P 3,779 (May 2, 2011)
R 260 (May 6, 2011)
Canada
S 73 (April 15, 2011)
P 104 (April 26, 2011)
Europe/Asia
S 52 (April 25, 2011)
P 338 (May 2, 2011)
Hong Kong
S 2 (April 27, 2011)
P 1 (March 23, 2011)
Australia
S 9 (April 10, 2011)
P 17 (January 21, 2011)
S = Signature Series (Model S)
P = General Production (Model S)
R = Roadster Owner/Friends and Family