Docstoc is a useful tool for sharing PDFs, PowerPoint presentations and Word and Excel documents. It can also be used to embed files of these formats into a blog post in a customizable document viewer.
I’ve just set up an account, and have uploaded two papers by Alan Hodgkin and Andrew Huxley, in which they describe their classic experiments on the giant axon of the squid. With these experiments, which were performed in the early 1950s, Hodgkin and Huxley elucidated the mechanism of the action potential, and were subsequently awarded the Nobel Prize for Physiology or Medicine.
The papers (which I found at the Society for Neuroscience website) can be downloaded from Docstoc, or viewed directly from this page. Clicking the button at the top right of the document viewer produces a drop-down menu, which includes options to zoom in on the document and to view in full screen.