Is it worth it to "get in good" with recruiters?

Everywhere you look today, if you're in the job market, you're bombarded by recruiters.  There are the good ones that work directly for employers (HR Recruiting teams for companies like Home Depot & Sage Software are the norm) and then there are the ones that aren't so good.  Those guys get paid at different levels if they send a qualified resume to an employer, set up a phone interview, if they get you to an in person interview & at a totally different pay level if you "convert" into an employee.

So, let's say you're talking to a recruiter almost daily, you have quite a rapport built with them, they're coaching you non-stop & then *poof* they stop calling.  That means the employer is no longer interested in you & because of that the recruiter no longer sees any value in dealing with you anymore.  I personally find this rude and totally unprofessional.  There's no wonder that recruiters get such a bad name.  If you don't "convert" into an employee there's no point in them trying to "groom" you for the perfect job they found for you, you no longer have any worth to them & they're out looking for someone else to fill that perfect position so they can get paid.  I believe that if they really wanted to help you find a job they would spend some time after they hear back from the potential employer giving you feedback about what may have been shortfalls in your interview or resume critiques, but nothing like this has happened for me in the 6 months I have been on the search.

The dedicated company recruiters (HR team members at various companies like Home Depot, et al) will not do any sort of "coaching" regarding the job for which you will be interviewing.  They are just there as a front line filter to be sure you fit the criteria that the hiring manager is looking for in a candidate/employee.  They aren't paid by the amount of resumes that they pass along to hiring managers, they may get bonuses for finding a candidate after they work there for 3 months or so, but their job isn't to get  you into that position like the contract recruiters.

There's all this advice out there about what keywords to use in your resume or on your online profiles on LinkedIn, Monster, The Ladders, Career Builder, Dice.com and the like in order to get yourself recognized by recruiters.  But, I find myself wondering daily if it is even worth it.  They almost always get my hopes up, never return calls or emails, and dump me after what I consider a good call/interview.  It's like dating in college all over again.  One starts to get a complex, and with no real feedback about what you could do to change, one just continues to do what one has always done.

So, I'm wondering, for any of you who have been on the search for new employment lately, have you used an interview "coach" to get you primed or to give you feedback based on how you reported the interviews you've had?  What say you?