Just noticed that you can add google friend connect to your about me page, and for those that offer discounts and other stuff through the about me page it will go across to the persons blog newsfeed, so that they get updated on your special offers and other promos that you use your page for.
maybe worth trying if it aids your methods or if a lot of your users use blogger.
Just google Google FriendConnect to find it and it is a simple case off adding your about me page name and address and then eventually copy and paste the code to your about me page after you tweak the colours to suit.