konzahiker below gave me what I wanted, but I wasn't aware GDocs had this capability. It's definitely going to come in handy. Thanks!

You can use Google docs to bulk convert to PDF, [maybe this will help](http://www.labnol.org/internet/batch-pdf-converter/10796/).

Your comment made me think of something that I hadn't before. I have the messages in Yahoo and Gmail, IMAP'ed them down to Mail.App and I discovered that I can save them as rich text. I know where to go from there! Thanks a lot.

I've been trying to find a way to convert old email histories to PDF to just have a single record of communication in one place.

I know that I can convert individual emails to PDF then join them, but is there a way to automate it or a program that can just take all the emails that I tell it to and it spits out a pretty PDF?

EDIT: Got what I was looking for. Gracias. 

Converting e-mail history to PDF?