Currently supported only for Linkedin, you can just look up reviews for job postings while you are at the linkedin page.
Recruit, by Expensehut is based on user input so if there are no reviews, it means no users have added a review for this job.
yes, Glassdoor.com and Dice.com are next on the list. If you have other websites on mind, please write to us.
May or may not be in the near future. But please do write to us if you have a opinion.