hm, meanwhile I do not know myself, what I meant with "entry-links"
I think, I mean "Top Exits" - these is installed in "Karma: Zeigt die Top-Exit-Links des Blogs" and "Top Exits" and "Links des Artikels"
As I say - I dont know, what I meant, is there a plugin "entry_links"?
But, searching on the plugin list, there are some other related plugins, which would be nice on supersized:
serendipity_event_relatedlink
serendipity_event_findmore
serendipity_event_freetag