Funnel images

I've seen many different funnels over the last few years - II like the one below which I've taken from: http://www.funnelholic.com/2008/02/15/the-funnels-are-back-i-like-this-one/. in a simple way,  it demonstrates how the top of the funnel is simply an extension of the whole sales process. In terms of helping the funnel run smoothly, there's also a good thought leadership piece on the right metrics to look at here: http://www.funnelholic.com/2009/04/02/thought-leadership-interview-13-engagement-marketing-101-will-schnabel-from-silverpop-engage-b2b/