I'd like to be able to right click on the newsgroups window and select "Get
New Headers in Subscribed Groups" from the context menu.  I've made a patch
against CVS for this:
(http://packetspike.net/~daniel/pan_get_sub_headers.diff)

--------------------
--- pan/pan/grouplist.c 2003-12-02 16:50:40.000000000 -0800
+++ pan_mod/pan/grouplist.c     2003-09-02 14:30:34.000000000 -0700
@@ -58,6 +58,7 @@
 {
        /* h */ {N_("/Get New _Headers"), NULL,
group_action_selected_download_new, 0, NULL},
        /* b */ {N_("/Get New Headers and _Bodies"), NULL,
group_action_selected_download_new_and_bodies, 0, NULL},
+            {N_("/Get New Headers in Subscribed Groups"), NULL,
group_action_subscribed_download_new, 0, NULL},
        /* o */ {N_("/More Download _Options..."), NULL,
group_action_selected_download_dialog, 0, NULL},
        /* c */ {N_("/Refresh Article _Counts"), NULL,
group_action_selected_update_count_info, 0, "<StockItem>", GTK_STOCK_REFRESH},
        /*   */ {N_("/---"), NULL, NULL, 0, "<Separator>"},
@@ -525,6 +526,7 @@
                        menu_set_sensitive (gif, "/Delete Group's
Articles", have_group);
                        menu_set_sensitive (gif, "/Get New Headers",
have_group);
                        menu_set_sensitive (gif, "/Get New Headers and
Bodies", have_group);
+            menu_set_sensitive (gif, "/Get New Headers in Subscribed
Groups", 1);
                        menu_set_sensitive (gif, "/More Download
Options...", have_group);
                        menu_set_sensitive (gif, "/Refresh Article Counts",
have_group);
                        menu_set_sensitive (gif, "/Subscribe", have_group);