Apparently, in order to add the like button,you need to be 'verified' by Facebook (purportedly to insure you're not some kind of cyber evil-doer) and this is done by phone or credit card number.
Uuhhhh. Credit card number? Seriously? This is the same gigantic entity that doesn't seem too worried about my privacy and personal information. Give a credit card number- I don't think so.
So anyway, it looks like I'll have to go with a couple of the other, less desirable facebook thingies. I did manage to get a facebook like/share button at the end of my blog posts - and that was entirely due to a google search and a random dude who had it on his website.
Thanksfor listening to my rant. I promise not to do this too often. In the meantime, please come visit me on facebook!