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Ship Date: January 27, 2010
Shipping Speed: Standard USPS
Carrier Tracking ID: 420079409102805213907284275588
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February 1, 2010
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See above photo of label, too.
For MLS, RUSH orders are customer number 20936. Since there aren't many of these, I could conceivably check these to see the status of an order.
You could concievably do the same for regular firm order 20930, but you'll need to keep better track of the last order date to have arrived. MLS usually ships once a week. Check the ship date on the box!
I think that 20934 relates to OP books or books that have reports on them. This can also be useful for looking for "problem books"