Wikipedia: Now Telling You What’s What While You’re IM’ing

While chatting with a fellow SEO (whose identity I concealed, just in case he doesn’t want his screen name public) over IM, I noticed that certain words were being underlined in green. When I hovered my cursor over an underlined word, I got a little pop-up definition, courtesy of Wikipedia. They even defined what “haha” meant (I slapped a border around the especially amusing part of the definition):

So that’s what the extra “ha’s” mean! How very insightful!

Unfortunately, there’s still a little problem with context:

Not quite sure this guy meant “going to go to the Genesis YM2612,” but I could be wrong..

P.S. As Oilman pointed out in the comments, this feature has apparently been around for a while, but I’m a slow loser so oh well.