We try
Something we always strive to do is be unique, but still traditional. Typically, taking a traditional idea and making it your own by doing something new with it.
It's pretty clear that a basic "Coming Soon" isn't going to accomplish anything. People see it as being unprepared.
However, the question comes in, "Well I'm in the middle of creating the site. The hosting for the site is in place, etc. How do I let people know we're there?"
If you feel the need to put something up, but don't have any new ideas....how about an contact method be listed. At least then, the people can contact you with questions, etc.