Not long ago, I prepared for myself a Plucker eBook of the Church Fathers, based on the great collection at New Advent. With permission of Kevin Knight who runs New Admin (thank you!), I have now posted the ebook here. It's 32mb.
I also posted a Plucker eBook of St Thomas's Summa Theologica at the same location.
The Plucker format can be read on most modern PDAs (PalmOS, PPC or Linux), computers (Windows XP, Mac OS X or Linux) and the IRex iLiad, and the ebook download page includes information on how to get reading software for your device.
I like the idea of having the Church Fathers with me always on my Palm TX. Right now I'm reading St. Irenaeus. [edited]