After 2 days of usage, the verdict is brilliant! I couldn't be more happy, as I've been waiting forever to be able to merge these 2 babies together...
My old Gallery1 albums all imported accross beautifully... the permissions I'm able to set for different usergroups is excellent... I'm over the moon...
Cheers Whodah! This should be turned into an official integration hack as soon as Gallery2 becomes RC or full release.