AnkitMaheshwari - 4:19 am on Apr 28, 2010 (gmt 0)

Your query string should contain the location for Maps onebox to appear (provided someone has listed a business for that location).

There are times when it takes upto 1-2 days for the database to update before the listing starts to show. You might be seeing it as you would be logged in with the same id with which listing was done.