Aha! A revelation! Yahoo groups just started doing RSS feeds for all of their public groups. That means I can import the dang things into my RSS Newsreader and stop getting all the emails. That will be way easier for me, and keep my email flow down a bit.
The only trouble is, several of the more active groups I'm on don't have this option enabled, because they have their archives set to be viewable by members only. This is easy to change if you're the group owner, and I can't really see any negatives to doing so unless you talk about secret stuff on your group (none of the ones I'm on do). So I have written to the group owners of these lists (about 30 of them) and asked them to change that setting. We'll see if they do. :)