pdf to epub for eReaders

so, I'm one of those geeks getting an iPad ASAP. I have tons of pdfs, and wanted to find a converter for ePub format. There are lots of paid apps, but I found this free one: http://www.epub2go.com/Web/default.aspx seems to work. I converted that ShadowOfTheTorture.pdf that's been floating around the internet into a .epub format and it seems to work fine. (no I'm not uploading it for anyone). this just seems easier than having to use different software to manage the libraries of different format digital books. I don't want to start an iPad discussion, so spare me the "you don't need a big ipod touch" arguments please. iPad + Brushes.app is a combination I've been wanting for over a decade. I'd consider buying it just for the single use as a digital sketchpad. anything else is gravy.