The full content vs. snippets/summary RSS feed debate is well known, and perhaps over-discussed. My only contribution to the matter is an enhanced version of my Bloglines Tweaks user script. Each item now has a "Expand" link that attempts to fetch the destination page and extract the full article content, which then replaces the snippet. It appears to work pretty well with MacMinute, Ars Technica, Mac Rumors and Palm Info Center, though I'm sure that there are sites for which its (simple) heuristics fail. Feedback is welcome (my email address is in the sidebar).
The user script requires version 0.2.6 or later of Greasemonkey, and my previous entry on the subject has installation instructions.