Are your URLs predictable? If that's not the case, then I highly recommend you to take a look a http://seo4ajax.com http://seo4ajax.com (disclaimer: I'm one of

Are your URLs predictable? If that's not the case, then I highly recommend you to take a look a http://seo4ajax.com http://seo4ajax.com (disclaimer: I'm one of the co-founder) which is the only service that handles this problem correctly.