Okay I'm using the Lion Developers preview, all legit. When I try and open applications that I've moved from the Snow Leopard partition to Lion I just get a error telling me that the app could not be opened as it is not compatible. This happens with Apple products such as iWork and iLife, but some third party apps still work! Obviously this is not surprising and will doubtless be fixed, but will the whole OS be updated to be able to run these apps or will we have to upgrade applications separately in order to be able to run them 
Cheers x
Cheers x