Followup to Security: Where are MySQL passwords stored?
The MySQL documentation provided as reference to the accepted answer does not provide any information if additional information (SALTS) is used in the hashing function (The documentation says it is not reversible, using a hash function).
Would a stolen
SELECT Password FROM user be susceptible to lookup/rainbow tables?
EDIT: Are there any publicly available accounts of a mysql user table being "cracked" for passwords?