Kollecta is a social networking site designed for collectors of all shapes and sizes. The site is currently in beta and has a database of "over a million collectible items" and allows you to check off what you currently have in your collection, what you'd like to add, and what you're willing to sell to someone else.

Once you've created a profile with all of your stuff you can join a group and share that list with other collectors on the site. Users in the group can talk about their passion for coins, stamps, smurfs, or whatever else it is you're collecting, rate items value, share collecting tips, and arrange to buy, sell, or trade items with others.

Providing what you collect is in Kollecta's database, the site could be a good place to keep track of your collection and connect with people who can help you add to it. If what you collect isn't in their database, or there isn't a group for it yet Kollecta provides you tools to add them.

Kollecta is currently free, with mention on the site of a potential cost later down the road. A similar site for collectors is iTaggit.

[via EmilyChang]

Do you have some things that you would like to tell a story about and connect with people who have the same interests? Maybe even get an estimate of their worth? This is what MyThings brings to the table.

The site was originally developed as a service to track down stolen and looted artworks from World War II, but has since evolved into a separate social network where users can try and valuate the art and antiques of others. Carrying such items as consumer electronics, furniture, collections, or collectibles, MyThings encourages professionals to communicate with owners of the goods in question, giving the item an estimate of worth.

The site is great if you want to get a quick estimate on an item from a community setting. Is it just us, or does everyone think that social networks might be getting a little out of control?

[via webware]

Yesterday afternoon, Flickr announced the release of a new feature that hard core Flickr users have been clamoring for for a while now: subsets or sets of sets. Or, as Flickr calls them, collections. Users can now build up large collections of pictures from building blocks of multiple sets, and even other collections. To differentiate them from regular sets when you're looking at them in the sidebar, collections have icons that are mosaics, with a number of pictures from the different sets that make up the collection.

As you can see from the screencap below, there are a couple of quirks. First, collections can only be nested 5 deep. for most people, this shouldn't be an issue, but some power users may hit that limit fairly quickly. Second, any collection can be composed of sets or other collections, but not both. That means if you have a collection and you want to create a new collection with that collection plus another set, you have to put the set into a collection first. There doesn't seem to be anything to stop you from creating a collection with a single set, so it's no big deal, but it is an extra bit of hassle, and it potentially costs you a layer of nested collections.

Finally, drag and drop editing of sets and mosaics doesn't seem to have the kinks worked out in Safari yet. When I clicked on the icons to arrange the mosaic on my test collection, the icons floated around the window nowhere near the mouse pointer. And the finished collection never showed up, even though everything looked fine. Firefox seems just fine, though.