I just CRIED laughing at the email to the library. The whole idea is funny, but what really set me off was that the "message" begins with "Weeeeee"...
Obviously, someone was having fun with the keyboard. Based upon the intro, I'm guessing that your translation would be "Weeeee, this is fun! This thing makes clicky noises when I dance on it!"
For her part, Sophie often likes to "contribute" to my TCS messages. I'm a total computer nerd, I'm always online, and she likes to lie on the desk between the keyboard and the monitor base. Occasionally, if she decides she wants an ear scratch, she'll put her little elbows on the F1, F2, etc, keys, and then stretch her paws out towards me, mashing keys along the whole length of her "arms." Mostly this just results in windows opening and closing rapidly, followed by that awful system beep, but occasionally she'll come up with an actual message.
Recently I was typing a reply in a TCS thread, and Sophie typed something to the effect of "bnnnnnnny" into the message. Since one of her nicknames is Bunny, I came to the conclusion that she feels that when I'm writing about her, it's only right that she sign her name.