Joel Friedlander has written a great post about what could be an end of the business model many self-publishers have been using, the short discount model using LSI as the POD printer. There are quite a few good comments to go with the informative article which does a good job of summarizing this confusing and troubling situation.
In the case of my best selling title, the move by Amazon has destroyed sales and it has yet to really recover. Here is the link to the blog post - be sure to read it. Everyone who sells POD titles needs to be aware of this situation.