Is there a plugin for visitors to mark a post they especially like, so that the author of the post gets notified that someone really liked it? I've done something like this with a contact form script and hidden inputs within a loop via Blogger, but I was hoping that there might be a more elegant method for a WordPress multi-authored blog. I think that the Star marking system in GMail is something like this. A "Vote for this post"-type plugin might work for this purpose; is such a thing available? Thanks.