Anyone with a Nook?

I was wondering. I have numerous .doc files and .pdf files on my computer and I just recently got a Nook Color. It takes ages for the doc files to load in the reader and my issue with the pdf files is that it is unwieldy to read as is. Certainly neither are as easy to handle as my ebooks, which are all epub files. My question is...are there any good free pdf/doc to epub converters that anyone here could recommend? Thanks in advance. :)

Shannon