I wouldn't mind seeing a personal reading list that functioned similar to the prayer feature - add a book you want to read to the list, when you've read the book check it off and it goes to a "read" list at the bottom of the list. I've got a number of titles I'd like to read, and I keep forgetting which ones I mean to read until I happen across them again; it'd be nice to have different lists for different purposes/subjects.
I like the community reading lists, but I'd rather not put my own bucket list of to-read books for all the world to see.