It looks like the Comment This! service is no more.Fortunately, my exams will keep me from mourning the loss of your thoughtful comments (and especially your brilliant caption contest entries) for now.
It's been a good run, but the hard drive that the Comment This! data resided on died, and is not recoverable. I only received about $160 in donations, and that doesn't even cover my bandwidth for two months, much less replacement hardware. Blogger's comments system works well enough, maybe you should try it.
The CommentThis! admin.
Their loss isn't analogous to the burning of the library at Alexandria, but losing any meme is sad, indeed.
My sincerest apologies - and know that I'm just as sad as my regular commenters.
I'll get a new system up as soon as possible. . . .