Welcome.
Have you tried contacting eReader directly?
http://www.ereader.com/servlet/mw?a=v&t=support
I'd guess their customer service has gone down hill just like Fictionwise's has, but it might be worth a shot to see if they plan to do anything with their previous app (did they pull it or did Apple?). Their website makes it sound like the app is still available, but I don't think B&N has put much into keeping Fictionwise or eReader up to date. To the best of my knowledge there are no other apps supporting DRM'd eReader books.