Picasa Web Albums—the internet-facing component of the popular desktop photo management application—has added a new feature that lets you collaborate on albums with your friends.
Collaborating on an album is easy:
To make an album collaborative, sign in to Picasa Web Albums and add contributors. Just click the 'Share' button, add contributors, and leave the 'Let people I share with contribute photos' checkbox selected
You can also manage access for contributors you've added to the 'Shared with' list by toggling the 'plus' icon next to their name – when the plus icon is green they can add photos.
To contribute once you've been invited to collaborate on an album, just log into Picasa Web Albums with your Google account and visit the album you've been invited to join. Now you'll see an Add photos button you can hit to upload your own pics to the album.
It seems like a nice little feature, and definitely something we'd like to see from more photo sharing apps (we're looking at you, Flickr).
Collaborate on Picasa Web Albums [Google Photos Blog]