Ask Jeeves Missing Robots.txt File

In the past, I blamed MSN for Indexing Ask Jeeves SERPs but then today I saw that Google is also indexing Ask Jeeves SERPs. See the last result (#20) for tuxedos at Google, you will notice;

But then I spoke with Shawn and DigitalPoint and he took a quick look at Ask's robots.txt file, but couldn't find it at http://www.ask.com/robots.txt. So maybe that is the reason the other engines index Ask SERPs? Maybe Ask wants to be indexed? But why wouldn't Google manually exclude Ask SERP's from its index, since it may be duplicate results plus its linking to a direct competitor...