I happened upon a new application tonight--Tikatok.
"Tikatok™ is where kids channel their imagination into stories – and publish those stories into books to share with friends and family."
This site provides a writer's workshop-like format so that kids can publish online... I typically use Lulu.com for publishing students' work, but this application guides younger students in writing and publishing their stories in a kid-like fashion. I did not spend a significant amount of time on the site--but it looks as though probably K-4 would be the obvious audience. If your students do not have access to a scanner, Tikatok advises you to send the pictures to them and they will do it for you... Tikatok appears to have excellent customer service--so if you like a person on the other end helping you as you complete each project, give it a try... The cost looks to be a bit more expensive than Lulu.com, but worth checking it out if you want a unique publishing experience for younger grades...