I had a comment do that yesterday, it just disappeared after having shown to post. Glitch in the Matrix seems right.
I keep saving my posts as working copies in notepad until after I post and it goes through, especially the longer ones, just to avert this problem.
I guess I'm finding a little comfort in hearing I'm not the only one it happened to. But i will definitely make a change in my workflow so that it don't happen again. I dont think I'll be able to muster up the energy to rewrite that post for a while. :)