Red River Paper just posted Lightroom print mod templates for setting up and printing photo note / greeting cards. There are templates for many different popoular card sizes (sold by RRP and a number of other paper companies).
The templates are easy to use and best of all they are free.
If you want to download with you can go here:
http://tinyurl.com/3lykbhtPlease let me know if you have any questions.
Drew Hendrix
Red River Paper