I'm very excited to see MoI coming out for Mac OS X (even if it's running under X11). I'd truly love to see MoI on the iPad ;-)

I've got a v1 license (which I still use via VMWare Fusion), so my question is if I pay for an upgrade to v2 to get access to v3 beta will I then need to pay for another upgrade to get to v3 when it is released?