I've been registering my photos with the U.S. Copyright office for a couple of years now. For all of that time, the cost was $35 per batch. Effective May 1, 2014, the price went up to $55. For me, that means fewer and larger batches. Since I don't post anything that I haven't registered, it may mean a delay before you see my wonderful (ha!) photos.
And for those of you who don't know, any work of art (i.e. a photograph) is automatically copyrighted by the owner at the moment of its creation. However, if you ever need to sue someone for stealing, copying or using that work of art without your permission, your chances of receiving damages are pretty small unless you've registered the image with the Copyright office. See a recent discussion on watermarks for some useful information.
And for those of you who don't know, any work of art (i.e. a photograph) is automatically copyrighted by the owner at the moment of its creation. However, if you ever need to sue someone for stealing, copying or using that work of art without your permission, your chances of receiving damages are pretty small unless you've registered the image with the Copyright office. See a recent discussion on watermarks for some useful information.