Our new Download as... Orchard module brings the ability to download content items as files: currently HTML or PDF. This means you can give automatic download links for your contents on your Orchard sites (something that's our profession to develop). The module even cares about flattening hierarchies of content that are defined with container-contained connections. We already use the module so you can download the vast knowledge collection of Orchard Dojo Library.
You can see a demo of the module on the Orchard podcast.