AniDB O'Matic is the failure as the anime list for exchanging. 150 mb is not really good for this.
For example, you want to share your anime with a friend and it's hard (or impossible) for now to go to Internet. Then you can print your list of anime with filter "on cd" and give it to him.
Later it can become something better, like good xls-list, but let's go step by step.
Do you think we need such feature?
Automatic offline anime list
Moderator: AniDB
AoM never was inteded for anything such, heck it's not even intended for offline browsing, what you want is this:
http://anidb.info/perl-bin/animedb.pl?show=export
http://anidb.info/perl-bin/animedb.pl?show=export