For me to really understand something I need either a great diagram or for smaller ideas an evocative name.
Observing a variety of web businesses I have come to believe that the access to a market is the single most important factor in determining its eventual success.
Access to market can be through having a relevant and significant soapbox (37 Signals), finding the perfect niche publication (leveraging natural SEO) or most commonly, having inexpensive search terms available that are well suited to the business (cheap SEM).
Coining a term I find evocative for this (relatively) common idea of either underpriced SEO or SEM I am going to be calling them “neglected eyeballs”.
I really like the name because its catchy and it just makes me want to go help save them from their neglect wherever they are found.