Yahoo! Messenger IM Command

I was chatting up with a friend over Yahoo! Messenger, and accidentally, she typed "s: something" and a couple of seconds later, to our surprise, the IM window displayed the first search result for the "something" keyword from Yahoo! Search.

For example, in your Yahoo! IM window, just type in "s: pieces of rakesh" and you'll get a link to this site in a couple of seconds.

I don't know how useful this is. However, this got me wondering about other similar commands that the IM window might be supporting. I tried Googling (and yes, Yahooing too), but I couldn't find anything that documented these kinds of commands.

Maybe some of you have come across such commands? Please share your experiences or leave URLs that describes this in detail.