I've got an emotional attachment to dead tree format that won't go away just because I've got a Kindle. My LOTR, Trek etc. will remain on my shelves as physical books and I shall continue to purchase new titles as they come out.
That's not to say I don't love my Kindle - I do. I'm loading duplicates on to it for convenience (I may reach a point where I don't actually read my paper copies) and will be using it for stuff I read but don't 'collect'.
With regard to Trek novellas, I'll buy the download and again when collected in print.
For those of us with a lot of paper books we wish to 'digitise', you can't exactly copy them like you do CD's to an Ipod. I don't want to have to buy everything twice - has anyone come up with a proposal to get a digital copy WITH a paperback when you purchase ?