I have been interested in a new blogger, Seth, who has been blogging some thinking about the subject, including reviews of solutions on the Mac. I'd recommend you have a look at Tech Landscape, if you are interested in this topic.
All things Macintosh for biblical scholarship and ministry. Providing news, help, and discussion for bible scholars and ministers using Macintosh technologies as a tool for doing their work.
March 30, 2009
Mind-mapping at Tech Landscape
March 16, 2009
The Utility of Ebook Readers
However, one of the great advantages to the days when I used a Palm device is that I could roll my own e-texts. The ability to pull content from where I could get it offered the greatest advantage. If you have an iPhone or a Kindle and need an e-text management tool, there is an app called Calibre that may be for you. Calibre allows you to roll your own texts for use on an iPhone or a Kindle (and it does much more as well).
Amazon's entry into the field means that some ebooks of interest will be available to ministers and bible scholars, but still, relatively little for now. I suspect it will long be the case that the most useful e-texts we will load on our own devices will be pdf's we've pulled off our library full-text databases, and other custom sources, and that most often the capability to put our own content onto these devices will provide the greatest utility.