Host.123Flickr is a newly launched slide show creator that generates a hosted solution from your Flickr URL. This company is not affiliated with Flickr in any way.
This service is from the same folks that brought us 123Flickr, and both sites offer the same general service. With Host.123Flickr, it looks like all of a user's galleries are pulled in order to create several slide shows, whereas 123Flickr only pulls the most recent. This new release has a clean interface and pretty cool Flash implementation, though there's no way to click through images in their full size. You'll have to return to the thumbnails view to see the next image. Unlike the original 123Flickr, the new release does not offer the embed code for the gallery to be exported elsewhere.
With the similarities and differences between the two sites, I'm scratching my head trying to figure out why the two haven't been combined in some sort. Another service with similar offerings is SlideFlickr. In actual Flickr news, Yahoo Image search has recently integrated Flickr live feed for improved search results.