Oh, and for anyone wanting to see how I set this up, here's the screencap for the pipe I use.
It's a Fetch Feed (Sources->Fetch Feed, http://www.mangaupdates.com/rss.php
) connected to a Filter (Operators->Filter, one inclusive rule for each series title), connected to Pipe Output.
And has probably already been figured out, this technique for filtering RSS feeds can be used for any site that has a feed (and you can pull non-feed content too, but I've had mixed success with that).
tl;dr danny boy