myself and others i have spoken to have experienced this issue with MoMe as well. i had random data deleted from individual contacts (including my own email address & home address). MoMe online did not have the info either. i had friends who lost complete contacts. Not sure what's going on.
i don't sync contacts via iTunes so i can't help you there. there is definitely some strange activity with MoMe lately. Hope iCloud turns out better. :/
