To Update your contacts without messing with your sd card, or putting the information on the web:
1) go to contacts
2) view the contact you want to update
3) scroll down to the list of joined accounts
4) click on the list of joined accounts (hold finger until menu pops up)
5) click the "minus" button of any online accounts (facebook, twitter, ect.)
Now you can go back and update your contact list information. When finished,
just re-join the contact to their online account.