North Carolina Central University has a a MLS that you can do online, though not all electives are guaranteed to be taught that way. http://www.nccu.edu/curriculum/details.cfm?id=120 I've taken a class on metadata class, and been very impressed.
Admittedly I do have an MLS and I'm not working in libraries, but I did get my current job on the publishing side of things shortly after and as a direct result of getting my MLS, and my pay is more than twice what I was making before I got my Master's. Just be sure to get all the tech skills you can! There's plenty of librarians with humanities backgrounds, but ones with good computer skills are rarer. If you're sufficiently technically inclined there should be a wave of retirements soon, as the first systems librarians who got the jobs because they were there and knew *something* about computers hit retirement age.
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From what I've heard, the out-of-state tuition is cheaper in NC than it is many places. http://www.nccu.edu/formsdocs/proxy.cfm?file_id=894 for the graduate tuition schedule.
Admittedly I do have an MLS and I'm not working in libraries, but I did get my current job on the publishing side of things shortly after and as a direct result of getting my MLS, and my pay is more than twice what I was making before I got my Master's. Just be sure to get all the tech skills you can! There's plenty of librarians with humanities backgrounds, but ones with good computer skills are rarer. If you're sufficiently technically inclined there should be a wave of retirements soon, as the first systems librarians who got the jobs because they were there and knew *something* about computers hit retirement age.