I've been intrigued with Blurb's forward thinking on publishing both hard copy and eBooks. It's quite simple to convert the *.pdf associated with a book published by Blurb to an *.epub format which can be read on the iPad. Blurb makes it possible to buy an iPad version of an existing book for $1.99. I find the quality remarkable, better than using Blurb's Viewer to preview the book. One can flip pages or zoom in. The print-quality DPI comes in handy here. Once downloaded, the eBook will appear in the iBooks library.
Once set up, anyone with an iPad/iPhone viewing the "Sell" page for a Blurb book will have the option to purchase the iPad/iPhone version in addition to the hard copy options. Click here to go to the "Sell" page. In you are simply interested in the technology, I think you'll find it's worth $1.99. If you are interested in palladium prints, well, that will make it a real value!
Blurb also makes it possible to set up a way to sell the same book through Apple. In this case, you need an ISBN number and a pricing understanding. Typically, a book is priced about $9.99, where the author receives about half. This, however, is only available some Blurb Beta users.
Interestingly, if you sell through Blurb, it doesn't appear that you can set a profit margin and the whole $1.99 goes to Blurb. If you sell through Apple, you cannot continue to sell through Blurb, but of course you can set your price. [NOTE: April 10. You can set the profit margin for Blurb-published eBooks, once you have bought a single copy. I'll update to $9.99 May 1st.]
I'm planning to sell botth the Sense of the Distant Past and Xinjiang: From the Karakorams to Hemu on Apple for $9.99 beginning in May. But whether sold from Blurb or Apple, the eBook is the same and ends up in your iBooks library. So you can save $8 until I shift over to Apple. :) [NOTE: April 10. I did update the price of the former book to $9.99 as of today.]