Flickr is the newest offering from the clever kids at Ludicorp. If you only try one social networking software this year, make it Flickr. – I’ve been resisting all the Friendster-style things, but Ludicorp can always get me on board. [Except that as of May, I’m not really using it anymore since it’s very focused on photo sharing and my Treo doesn’t easily support getting its photos out to a Mac]