Kristine Kathryn Rusch has been running a series of posts about midlist backlist.
http://kriswrites.com/2011/01/26/the...times-part-15/
I'm really looking forward to getting my hands on some of the mass of backlist out there. And I'm all for writers doing it themselves, because they get a bigger cut of the proceeds, and yet the cost of the book is cheaper for me! Win/win.