Congrats on the new D700. I bought mine in June 2009 and have racked up close to 90,000 shutter actuations shooting mostly sports events. This camera is without doubt the best photography investment I have ever made. I recommend the Nikonians Pro Sling Strap or the OP/Tech equivalent.
With all of the equipment listed in your profile I find it difficult to believe that you have classified yourself as a Beginner - Just starting!