Goodreads - one thing lacking

I've been involved with Goodreads.com for some time, but I've only really got into it properly in the last year. It seems to be a huge site in terms of people involved, and there's certainly a huge amount of interaction. Plus the Goodreads staff are very helpful and quick off the mark.

Only one thing is lacking, I feel. And that's a way of recording the books you didn't finish in a year. I made a category on my own page for books I'd given up on and ones I'd put aside for the moment, but...