Hmmmmmm.....
I just finished about an hour of play and everything was fine.
I also just trawled the net and found out that it has NOTHING to do with the game par se.
I've just seen a video with the same problem on the Wii main screen, and also another one with the game Madden NFL.
Good News: Well folks.....it looks like it's an infrequent occurence that has nothing to do with the game inserted (phew.....looks like I'll be hanging onto it then.....2 more missions on and it just gets better and better - mission 3.1 where you have literally SWARMS and swarms of enemy aircraft hunting you down is MENTAL

)
Bad News: This means, however, that it is an issue with the Wii (I think) overheating during prolonged play, perhaps?.....I'm actually stumped here, but the fact that many other people have had the problem with other games as well indicates that it's not just me and that it isn't the games fault.
Aaahh well, a pretty odd gremlin to have in the system I think :(
As long as it isn't a regular occurence, I think I can live with it
