Feltbeats has posted the second half of that interview I mentioned the other day.

FB: Tell us what you think of Tom’s acting in The Disappeared?
JK: I thought that Tom’s acting was exceptional – otherwise I wouldn’t have cast him, Malfoy or not. There were quite a few demanding scenes and Tom delivered each and every time. That’s why I will work with him again and we have also become good friends now.

FB: Describe what it was like working with Tom?
JK: It was an immense pleasure to work with Tom – he’s not hard work at all and absolutely no ego – just a really genuine guy who is super talented. We have been talking about working together again in the future, both of us are very keen on the idea.