GH1 AVCHD on MAC
 

Don't know if it was posted before, but I just found out that Roxio's Toast Titanium 10 can convert GH1's AVCHD files!
I used to use iMovie for it, but I have the feeling that it didn't convert it to the best possible quality. Now with Toast 10 you have lots of formats to choose from and you can set all the settings yourself. I even works in batch! Finally a good solution.