What's the argument for self-publishing your own books? Besides the financial barrier to entry is relatively low, you retain your copyrights, have total creative control, earn substantially more money per book sold and typically have to do the same level of marketing whether you go through a traditional publisher or self-publish the argument of self-publishing starts looking brighter and brighter, BUT WAIT THERE'S MORE!
Read the LA Times article End of the Book by Tom Englehardt and you'll get a better glimpse as to why he says "publishing houses are struggling with tough times and and changing technology." Additionally, this should be more encouragement for you to truly considering publishing your own book. For additional resources you'll also want to read How to Self-Publish for Profit, Book Pimping and join publisherspublishing.com.
For motivational messages and details on book publishing follow me at twitter.com/jawar