Google sends shipping notices to Canadians for Google Nexus 7 tablets
Perhaps to appease the complaining Canadians, Google sent out some shipping confirms to some of those who had pre-ordered the tablet. The notice includes a tracking number (which may take 24 hours to find your package with) and the order date. The most important info was spotted on Google's support forum which said that all U.S. and Australian orders will ship on Tuesday (July 17th) while U.K. and Canadian orders are being shipped in waves. That's the word from Google about their pre-orders. If you ordered from a carrier or a retailer, your experience will be different.
source: Google via MobileSyrup