Speaking of eBooks, Safari comes close I think. I like that I am subscribing to a library of books, rather than to a specific title. I’m still trying to decide how effective the whole download token thing would work for me, given that the bulk of my programming time these days is in Qantas economy class with no access to the net. 

I also thought O’Reilly were onto an interesting idea with the Visual Studio.NET editions of their Nutshell books. Having the text of these reference books available integrated into HTML Help 2.0 in C#Builder and Delphi 8 appealed to me a lot, however they don’t seem to have expanded this offering beyond a handful of titles.