the best source for information on eBook reading -- software, hardware, you-name-it -- is MobileRead. Don't miss the forums, in particular the user-contributed eBooks with formatting, and make sure to bookmark the Wiki Knowledgebase (it's a great resource you can contribute to!).
openpub - Project Hosting on Google Code. an application of the Atom Syndication Format intended to enable content creators and distributors to distribute digital books via a simple catalog format. The mechanism through which compatible Reading Systems access the distributed catalog has three components: eBook content, XML catalog metadata, and an HTTP transport for the catalog. OPDS-compatible Reading Systems must support IDPF EPUB, and may optionally support additional formats.
We live in a software culture - that is, a culture where the production, distribution, and reception of most content - and increasingly, experiences - is mediated by software. And yet, most creative professionals do not know anything about the intellectual history of software they use daily - be it Photoshop, GIMP, Final Cut, After Effects, Blender, Flash, Maya, or MAX.