the site i've been working on is now available at thingdango.com.
the functionality includes logging in, listing, creating, and deleting items from your catalog. note tha signing in requires an openid identifier. see myopenid.com (among other openid identitiy providers) to get an openid URL. note that thingdango does not host images - it provides a field for an image url from an existing service such as flickr.