ahhh yeah I see... Unfortunately if using replacement variables they will work everywhere, I guess I didn't have "Amazon" in my header at the time.
You could do a custom plugin on the hook postbit_display_complete
with php code:
$find = 'amazon';
$replace = '<a href="http://www.amazon.com">Amazon</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);
That will replace all instances of "amazon" irregardless of case in posts ONLY and replace with the link.
There are various ways of coding this but the easiest is just to copy and paste additional lines for as many sites as you have, such as:
$find = 'amazon';
$replace = '<a href="http://www.amazon.com">Amazon</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);
$find = 'ebay';
$replace = '<a href="http://www.ebay.com">Ebay</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);
$find = 'woot';
$replace = '<a href="http://www.woot.com">WOOT</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);
... and so on...
This could be an interesting mod- is the only one out there really that buggy?