Friday, the Inside AdWords blog announced a new feature that allows advertisers to see how their ads appear. So if you want to test the appearance of your ad locally or based on a specific set of geographic criteria, you can.
Go to www.google.com/adpreview and type in your keyword phrase. If you want to add geo-specific criteria, you can. To define the country enter &gl=[Two Letter Country Code Here], to define the region enter &gr=[region code here], you can also define city, latitude and longitude, postal code and DMA. More details at the AdWords Help Center.