I downloaded and compiled (then recompiled to address an issue noted in the forum) YahooPOPs! an awesome program that combines a web scraper and a POP server into a program that you run on your computer. The upshot of this is that it lets you check your Yahoo email account from any standard POP3 compliant mail client.
This is great, because I'm trying to move away from Yahoo since I've gotten new email addresses with the web hosting package my friends and I bought. With YahooPOPs!, I'm able to clean out all those saved messages I have on Yahoo, and I don't have to pay extra to get the Yahoo POP service to do it.
It works pretty well. Once I figured out what I was doing, it only crashed on me once with some kind of parsing error or something. For all I know, Yahoo gave it one of those "Temporary Problem" pages and that threw it off. Whatever it was, I'm happy with how it works, and it hasn't given me a problem since.
I'm going to also give a try to a similar program that works for Hotmail accounts, I'll let you know how that one works!