I admit that I'm feeling my way along here and teaching myself as I go, and this is a good example. I published the e-book version of the novel through Smashwords on July 11, 2011. It took a couple of weeks for it to get processed into their premium catalogue for distribution to Apple, Sony, B&N, Kobo et al. Amazon is listed there as well but it took me a while to figure out that the two rivals are not playing well together at the moment. I dithered and dithered, hoping it would get shipped, then finally realized I'd have to take it to Amazon myself. A bit of research confirmed for me that other authors are doing the same thing, so this afternoon I got on the job. Six hours later it was available on their website at the above link.
I have to say that I find this whole e-book thing really impressive. Now I have to get busy drawing some attention to the darned thing.