I have expressed my annoyance of Goodreads along with so many others. When I read this piece about Bookwyrm, I pretty much moved instantly.
Good to see Data-portability working as it should. About 2mins to export my reading lists and books out of Goodreads and then about 3mins to pick an instance of Bookwyrm and setup an account, then about 5mins to import the books and lists.
Great stuff!