Hi,
I notice this thread is stickied, but the latest posts are from 2009, with a lot of links not working.
I've come across this free star atlas:
http://www.deepskywatch.com/deep-sky-hunter-atlas.html
It has stars down to magnitude 10.2 and DSOs down to magnitude 14. So it is really detailed. There's also a list of DSOs, which I have been using as a guide for what to look at.
I have not checked it's accuracy, but found it worth sharing. Let me know if any of you have experience with this atlas.