I've always been of the impression that Certs will definitely help you get an interview if someone is looking for that particular skill. I have even heard people tell me that they have selected one person over another because they had a certain Cert.
As a consultant it is expected that I have Certs for the technologies I work with. Most partners are now requiring that people who sell and implement their technologies have a certain number of people in the company certified.
So who really needs certifications? What do the customers think? Is it an advantage to have a Cert over someone that doesn't?