5. The method of claim 1 , further comprising: identifying reviews for the geographic area and business category that are likely to be spam; and removing those reviews determined to likely be spam from the list of reviews used to identify an expert.
5. The method of claim 1 , further comprising: identifying reviews for the geographic area and business category that are likely to be spam; and removing those reviews determined to likely be spam from the list of reviews used to identify an expert. 6. The method of claim 5 , wherein identifying reviews for the geographic area and business category that are likely to be spam comprises: obtaining, for at least some of the reviews, indications from users expressing whether a respective review is helpful; and identifying reviews for the geographic area and business category that are likely to be spam in response to determining that at least some reviews are spam based on the indications.