I decided to take some time to figure out how template suggestions work in Drupal 7 being that the release date is getting very close. At the time of this writing Drupal 7 is in RC 4, but they are saying that it will be released officially on January 5th of 2011. I have been working with 7 for a few weeks and finally decided to see if I could get the template suggestions to work. A few things have changed, but they are not that much different from the way they worked in 6. The first difference is that 7 uses a double "-" for its templates by default.