Thanks Julia, now I understand what you're referring to. I use Firefox as a browser and that has some add-ons that one can use to update social networking sites. I sometimes have the experience of finding that I've updated a site (an example was Picasa Web Albums) and I wasn't aware I'd set an app to update it. Bonus. It must be a setting in iPhoto that's doing it for me. There's just so many tools and tricks out there one battles to keep up at times.
I have used multiple tools such as:
19 Twitter Desktops Apps: http://mashable.com/2009/06/27/twitter-desktop-apps/
Adobe Air Products: http://www.adobe.com/products/air/
Google Buzz: http://www.google.com/buzz
I was just introduced to this new site from Jane Hart from the UK- it is a lifesaver for me. I can now Tweet and it now bookmarks my links embedded in my Twitter account to Delicious. I wish I had this two years ago- but am thankful I have it now! Packrati.us = Twitter + Delicious http://packrati.us