Flektor is a new Flash-based content mashup tool. Users can pull in photos from several hosting services like flickr, MySpace, and Photobucket to make slick-looking, embeddable media slide shows for blogs, Web sites or social networks. It's a lot like Mixercast, and other media mashup services like RockYou and SplashCast.
Flektor's interface is drag-and-drop, and has a very short learning curve. To add media to your show, just drag imported media files down to a timeline at the bottom of the screen, where they can be rearranged or removed at any time. There are also "Flidgets" which can be inserted into your show to add live chat, a live broadcast from your Webcam, or cliched film effects like color bars or static. What's really neat is the ability to edit any picture with some easy-to-use sliders that let you do simple, on-the-fly alterations to your photographs--something you'd find on a Web-based photo editing tool like Picnik.
To add a little flair to your show, there are nearly 100 transitions, effects, and filters that can be put on top of or in between your media. You can also edit each effect and change its appearance. Out of the many transitions I've seen on some of these Flash editors (Photobucket's Remix in particular), Flektor has some really snappy and good-looking effects.
The main hindrance in using Flektor is how long it takes to communicate with the third-party services. Flickr in particular takes quite a while to sync up photos from various albums. On the upside, the MySpace integration is very simple; just give it a username and it will pull up photos members have uploaded in addition to any images that have been embedded in user comments. It's also easy to embed your Flektor player on a number of services, with a handy export page that provides special embedding codes for a dozen services (including Google's Orkut).
I've embedded a sample "Flek" I put together using some photo and video clips. For screenshots of the editing interface, keep reading.