Why do you insist on putting “Read More!” on every damned post, even the ones that aren’t folded?
If anybody has HTML-fu that will allow me to fold a post in Blogger without the plague of fruitless “Read More!”s, please do enlighten me. I want to blather about Star Trek, but put the spoilers below the fold for virgin eyes.
It's a bit of a cheat, but you can divide your article into two articles, then give the spoiler portion an old date. In your case, giving it a date of two or three days ago should get it off the front page.
http://hackosphere.blogspot.com/2006/11/selective-expandable-posts.html(don't miss step 1!)
http://www.askatechlord.com/2008/07/expandable-post-summaries.html