I just tried deleting the account through the GUI and I get this: (and the account does not get deleted):

Traceback (most recent call last):
File "/opt/maemo/usr/share/erminig/settings_ui.py", line 15, del_google_acct(widget=<hildon.Button object at 0x41eab328 (HildonButton at 0x8a1488)>, data=<hildon.Dialog object at 0x418360d0 (HildonDialog at 0x88d2f0)>)
def del_google_acct(widget, data):
id = get_google_acct_id()
account = google_accounts.get_account_by_id(id)
variables: {'id': ('builtin', <built-in function id>), 'get_google_acct_id': ('global', <function get_google_acct_id at 0x410a0b30>)}
File "/opt/maemo/usr/share/erminig/settings_ui.py", line 12, get_google_acct_id()
(model, iter) = ts.get_selected()
return model.get_value(iter, 0)
variables: {'model.get_value': ('local', <built-in method get_value of gtk.ListStore object at 0x41ea9fd0>), 'iter': ('local', None)}
TypeError: iter must be a GtkTreeIter

Where is the config stored so I can delete it manually?