One thing that is annoying with all these review sites is that there is no way to verify if the reviewer has actually used the service she is reviewing. Amazon

One thing that is annoying with all these review sites is that there is no way to verify if the reviewer has actually used the service she is reviewing. Amazon differentiates between the reviews from people who have actually bought the product, from those who may not have. If you could figure out a way to do it on your site, it would be cool (may be put a unique code in the bill, the customer has to enter it to add her review). Even though the quantity of reviews would be much lesser this way, the quality would be very high.