The problem that I have been having with Plaxo is how it deals with imported data. For example, when you associate a flickr account to your Plaxo account, Plaxo creates an album in your Plaxo account. This album shows your public flickr photo. I have two problems with Plaxo's integration.
- Photos do not include links to flickr page for that photo. I believe that this part of the terms of service of flickr to include that link.
- Plaxo implements its own comment system for photos. Personally, I want all comments for photos entered on the flickr page itself.
I like how Facebook integrates with flickr, with the Flickr app. On Facebook, an is added to your News Feed, but clicking on it will take you to the Facebook pages.
Plaxo does have a good solution for synchronizing contacts. I have used it to synchronizing contacts between Thunderbird, Outlook and my iPhone. Since I have switched to Google Mobile Sync, I don't have a need for Plaxo.