[ifonline]

Set up two directories for two different databases on one MobileMe account and it should work. In other words, for your database, you would have something like:

idisk.me.com/{YOUR MEMBER NAME}/Documents/OmniFocusHis/{YOUR DATABASE}

And for her database, something like:

idisk.me.com/{YOUR MEMBER NAME}/Documents/OmniFocusHers/{HER DATABASE}