Yesterday Flickr announced here that you will be able to group your sets together into “collections”. More details and gripes are highlighted here. This wasn’t the first feature that I wanted added to Flickr functionality (add titles and captions to slideshows next please!), but it’s definitely a good worthy upgrade to the service. This is awesome because while having a Pro account and the ability to group your pictures into sets is great, eventually your sets are going to grow out of control.
I’ve piled up >60 sets or so over the last couple years, but I’ve neatly categorized each one of them into one of six collections. They’ve made a cool new “mosaic” icon to represent collections, so go ahead and re-discover some of my older sets though each collection.