at first i thought you'd do best to switch off the sidebar, but then i realized you would also lose the hooks you will need over there to add your custom content. instead i think you should filter the widgets array to point the primary and secondary widgets to run off of your function instead of the thematic default... which pretty much says 'if i am active i will display'. by writing your own widget function you can 'if it is a single page do something else here... if not ..blah blah.
here's how you point the widgets to your new functions
/* Modify the Widget Areas */
function mod_widget_areas($content) {
$content['Primary Aside']['function'] = 'child_primary_aside';
$content['Secondary Aside']['function'] = 'child_secondary_aside';
return $content;
}
add_filter('thematic_widgetized_areas', 'mod_widget_areas');
Here is how you'd define the new functions (not their names should match to what you put in the array above.
// Define the Primary Aside
function child_primary_aside() {
if (is_single()) {
// do your thing with the excerpts
}
elseif (is_active_sidebar('primary-aside')) {
echo thematic_before_widget_area('primary-aside');
dynamic_sidebar('primary-aside');
echo thematic_after_widget_area('primary-aside');
}
}
// Define the secondary Aside
function child_secondary_aside() {
if (is_single()) {
// do your thing with the excerpts- leave blank- whatevever
}
elseif (is_active_sidebar('secondary-aside')) {
echo thematic_before_widget_area('secondary-aside');
dynamic_sidebar('secondary-aside');
echo thematic_after_widget_area('secondary-aside');
}
}
that should get you started