Hopefully we'll also be able to set the 'display by' field for every record
Haven't seen that functionality yet. Please file an enhancement request in bugs.maemo.org if there isn't one already, plus elaborate why it can be helpful.
Can confirm this, I have N900 and there is no OTA SyncML capability... This means that there is no Ovi Contacts via SyncML but Ovi is listed under the My Accounts Control Panel option. Adding my Ovi details into this didn't pull down my Ovi contacts, just my Ovi chat contacts...
Personally hoping that we will see a Google Contacts Sync client for Meamo 5 - Since Android arrived all my contacts are in Google contacts...
No, unfortunately no syncml-over-http for the N900. So you cannot backup/restore your contacts on "Contacts on Ovi".
The setting in My Accounts for OVI is as badger says only for the XMPP-service that was formerly known as "Nokia Chat". That's not the same as "Contacts on OVI", although they are branded very similar (and hopefully those 2 services will merge in the future).
Regarding Google Contacts & Calendar: The N900 has an activesync client (called Mail for Exchange). Since Google seems to use activesync on Android, they expose Contacts and Calendar over that (settings here: http://www.google.com/mobile/products/sync.htm).
Yes, addressbook will still be based on evolution data server as far as I know.
Yupp, still based on evolution-data-server, so updating syncevolution should be perfectly doable. Which is a nice solution for open syncml-solutions like Scheduleworld, but unfortunately not for "Contacts on OVI".
The syncml-server username+password for the later come as part of an SMS and are thus not visible to user. At least I have not found a way to read them out, but I do not know to much about S60.
The device connected directly to Nokia PC Suite 7.1 - Pulled in all my outlook contacts in the same way a s60 devices does (even supported pictures)
The Meamo 5 devices have support for the same PC connectivity as s60. When plugging a USB cable, you are presented with a menu - Mass Storage or PC Suite.