Some possible workarounds are to contact the reviewer (usually, there's a way to communicate if you click on the reviewer's name) for permission (an email permission should be fine). If that's not possible, using one or two lines from the review is probably permissible under fair use principles -- although, again, the Dear Rich Staff would counsel against using the reviewer's name without permission.
*Speaking of Amazon's Conditions of Use ... You might want to think twice before posting a bad review of that new Lindsay Lohan movie. As an Amazon reviewer, you agree to pay for Amazon's court costs and damages if a lawsuit is filed as a result of your comments! Ouch!