"Elvis is everywhere..."
The cover story of the February 2003 Fortean Times is very interesting: a study of the people who worship Elvis, or see him, well, everywhere. It's not on the Fortean Times website yet, but there are lots of interesting stories to look at.
But, there are some websites you can look at in the meantime, that I have transcribed from the endnotes of the story. Such as:
The Official Elvis site
The First Church of Jesus Christ, Elvis
Elvis Crawler--The Elvis Community
It's one of those things that make you go "Whaaaa?"