Just wanted to make a quick comment. Ash noticed that your mod will not work with anyone who is using table prefixes.
For instance:
$sql = "INSERT INTO feeds
Needs to be changed to:
$sql = "INSERT INTO " . table_feeds . "
That's just one example. I have a feeling there are quite a few instances where table prefix changes need to be made. Besides that, it looks like a great mod. Thanks for the contribution.