Tentatively for an October launch, I've set up a group/bookclub (discussion room) and some reading lists to do possibly monthly buddy reads. You don't have to join reading lists or the group in order to participate in any buddy reads of interest.
Suggest books and categories on either (or on any of these posts tagged "Project Gutenberg Buddy Reads"). Just because I put one book in the reading list doesn't mean that will be the buddy read book (just means I had to stick one in to create the list or that someone already suggested it).
Discussion Room is at http://booklikes.com/groups/show/710/project-gutenberg-buddy-reads
Reading Lists are by category/genre (feel free to suggest others):
Science Fiction / Fantasy / Speculative Fiction - http://booklikes.com/apps/reading-lists/708/project-gutenberg-buddy-reads-sf-fantasy