True that it looks rookie to book trade professionals. On the other hand, I've just come across this, in the FAQs on the Creative Commons website at
http://creativecommons.org/about/
Q: Do I need a copyright notice to protect my work?
A: You do not need to apply a copyright notice to secure copyright protection. However, a copyright notice can be useful because it clearly signals to people that you believe you own copyright in your work and who to contact.
I also see it sometimes in newspaper pieces, for example, when the copyright belongs to the writer of the piece, rather than the paper/mag. Not so much the legal force of the ©, as a neat way of saying what you need to say.
Oh, and you can do it in any programme with the ASCII code, which is Alt + 0169.
Emma