Looks like a good start.  I agree with Traderman that most of this needs to wait until we get the logo (which is soon!).  But we do not have to wait to get the list going!
Maybe add a section on things that can be done (services you can buy) with your gridcoins.  A section on any Gridcoin promotions (links to threads of giveaways etc).  A section on advertising.  I am saving up  "Daily Bitcoins advertising credits" from here so that I can run some ads when we are ready.  You should also cross post this to https://cryptocointalk.com/forum/464-gridcoin-grc/ so that it hits the crypto folks as well.