Dale,
I love your topic selection here, excellent!
My main marketing strategy in my plan uses offline marketing to market my online sites, including my blog, The Profitable Business Edge 2.
I don't rely too much on Google at all actually.
But...
If they died...I suppose Yahoo and MSN would carry the weight of the natural search results. And...I have used MSN AdCenter with great success, along with Facebook PPC (uh oh, did I let a secret out of the bag?)
So, Google dying might actually be a blessing for me.