This addon provides a custom template for the Page List block that displays actual content from the page instead of the "description". (It also applies to the block's RSS feed).
INSTRUCTIONS
Add a "Page List" block to a page. Use the "Truncate Summaries" settings to configure the teasers:
Show ALL main blocks for each page: UNCHECK the "Truncate descriptions" checkbox.
Show ONE main block for each page: CHECK the "Truncate descriptions" checkbox and leave the "after ___ characters" box empty (or 0).
Show an EXCERPT of one main block for each page: CHECK the "Truncate descriptions" checkbox and enter a number into the "after ___ characters" box.
Click on the block and choose "Custom Template" from the popup menu.
Select "Teasers" from the dropdown menu, then click the "Update" button.