One of my favorite new features in the FeedDemon 1.5 beta is the "Expando" style, which is based on a combination of Techno-Weenie’s SimpleCollapsible style and Michael Sippey’s two-pane aggregator style.

Looks like I’m not alone in liking Expando.  Since the release of beta 2, several members of the FeedDemon beta forum have discussed improvements to the style, some of which are included in the version available from Arvind Satyanarayan’s blog.

Expando screenshot