Upon request:
The main sidebar is now switchable using a filter in your functions.php:
function kill_sidebar() {
return FALSE;
}
add_action('thematic_sidebar', 'kill_sidebar');
This will remove the sidebar everywhere on your blog. If you want to remove it only on a certain page, you can use this one:
function kill_sidebar() {
if (is_page('1') {
return FALSE;
} else {
return TRUE;
}
}
add_action('thematic_sidebar', 'kill_sidebar');
Keep in mind that this will completely prevent the execution of sidebar.php
Cheers,
Chris