Isn't it webOS specific then? I can't recall that someone ported/created Synergy on some other OS.
Synergy is mostly just Palm's name for the merging of contacts, calendars, etc for different accounts. I think it also describes the on-device method of managing those accounts and their permissions. Either way, it is not part of Palm/HP's cloud services. It isn't something unique to webOS -- other OS's do it too -- but Palm's always felt "nicer". It's hard to describe. Linked contacts in Android always felt more cumbersome, but probably just because I had experienced webOS first.
<edit: I mention it because it happens independently of visits to the App Catalog.>
I was going to mention that too, only thing that has remained missing on the "WebOS Account" has been the ability to sync not only apps, contacts, ' BUT PHOTOS or MUSIC ' like iCloud for iOS operating system for Apple devices. It was weird that even the WebOS Team didn't included that functionality long ago.....
Owner of an HP TouchPad (32GB) and a brand new Palm Pre 3 (16GB) for VZ wireless.
wasn't that _sync=true? I think that is what I tried once... it's working quite nice and all your stuff comes back after a profile restore. Of course it is not synced between devices, so "backup" would be more accurate.
I think the _sync field was described somewhere on developer.palm.com. It really is a great feature and I think some apps use it (like some of them never seem to forget my logins or settings or other data).