GoodReader for iPad 3.18.0 has been released, and the main improvements focus on handling files over a network, including shared files from PCs/Windows-based computers. The Dropbox support has received a large update – there is no size limit of files that can be uploaded through Dropbox.
GoodReader is an Adobe Acrobat/PDF reader for the iPad, but it does quite a bit more than that, as it can handle TXT and images as well as various word processing formats (possibly even audio/video, but I’ve never tested that aspect). It’s one of my top-5 non-genealogy specific apps on my iPad as I have a lot of genealogy-related PDF files that I’ve accumulated over the years, and it’s very easy to keep them organized, and it doesn’t choke, even on the larger ones.