I've been looking to change out my Flash-based slide shows that appear on my personal blog with a Silverlight-based slide show control. A quick Internet search revealed First Floor's Silverlight Slideshow control. It's a very polished-looking control that beats any of the Flash-based slide shows I've seen hands down.
I made a few enhancements to the control from what First Floor had, and I'm looking forward to working with Koen Zwikstra (of First Floor) to investigate incorporating these into his code base. The primary feature I've added deals with having three image sizes instead of just two: the largest one is only used in full-screen mode.
Watch for a follow-up article on the tricks I had to pull to get this Silverlight control working on Blogger while still pulling RSS photo feeds from PicasaWeb, despite the XSS-limitations imposed on Silverlight 1.0 controls.