I noticed a few tweets on the #unity3d hashtag about there being a free licence for the already free Unity3d for iOS and Android. Sure enough if you pop along to download Unity3d at the store you can add the ability to publish directly to iOS and Android. (offer expires april 8th 2012)

I already have the iOS basic licence and unity3d installed so it was a little less clear what to do.
On the store page there is a licence upgrade link in there you have yo paste in your existing licence number then you are able to “buy” for free the upgrade you need.
Unity will then send you a new licence number that you reactive in the unity client with the menus unity/serial number and away you go you now have targeting for publishing to web, windows, mac, iOS and android all enabled.
What are you waiting for ? It is a brilliant dev environment.
NB. As I point out at conferences when I rave about it I don’t work for unity3d I just really like what they do 🙂