Update - Blogger had released functionality that does this. See You Might As Well Jump! from Blogger Buzz.
Following an email exchange with Ranting Nerd, I decided to add expandable posts to this blog that allow a summary lead-in on the main page (instead of the whole post) and a link to the the rest of the post on a separate page. See the "Seinfeld" and "How Starbucks Saved My Life by Michael Gates Gill" summaries and full-post links below to view this functionality.