Douglas County Libraries continues to push the boundaries of local library hosting of ebooks. They recently released a new iOS app so patrons can direct download from their local collection. David Rothman at Library City has a really nice blog post with all of the details. The app itself can be found here: http://itunes.apple.com/us/app/idcl-reader/id565691104?ls=1&mt=8
If you aren’t familiar with the work of DCL, then have a listen to an interview I did with their former Collection Development Librarian, Jordana Vincent. Additional information about their project is available at E-voke.