What is the best SEO-friendly on-site user reviews SAAS provider?

[PGRob]

I think we will be looking to implement on-site SEO-friendly reviews at some point.  Just wondering if there are any opinions on which Software As A Service providers do a good job with this at a good price?

[MatthewEgan]

I really like Bazaar Voice for their on-site review integrations.

They spoke at GR2L during SXSW last year and I was very impressed with their offering.