Ask HN: Is it stupid to add In-App Purchasing now?

I've built a web app and iOS app that will soon be integrated ( http://inthatbox.com ). I'm planning to make the web app a freemium service, and was thinking that I'd move the iOS app to a free with In-App Purchasing model to match up with the web app. I also think that IAP would be beneficial to marketing of the app.

The question is, is it a bad idea to add IAP now, with all of the patent legal issues still undecided? I tend to think (/hope) that Apple will prevail in the long-run, but on the other hand I'd rather avoid being sued.

So basically the question is - Is it stupid to add IAP right now?

Also, if I shouldn't do it now, at what point should I begin to think about jumping in?