Finally Sideshow comes to Windows Mobile, well in a developer preview. This means that you will be able to use Sideshow gadgets on your Windows Mobile phone. I have just downloaded and installed it and the first thing I noticed is that its says you need to connect to the PC via Bluetooth which would mean I would need a Bluetooth dongle in my Media Center PC for it to work (my iMate Sideshow Photo frame used wifi)

So now all we need is some good Media Center Sideshow gadgets!

Today at TechReady 2008, we released the Windows SideShow for Windows Mobile Developer Preview, which you can download at http://www.microsoft.com/downloads/details.aspx?FamilyID=79f19684-f862-4e02-a2b0-0003b4565f34&displaylang=en .

Using this software, any Windows Mobile 5 or 6 phone can work as a Bluetooth-based SideShow device!  We’ve got some favorite uses of it already, including using it to control PowerPoint presentations while viewing the speaker notes, using it as a remote control to Windows Media Player, and viewing RSS feeds on the road. Really, though, we’ve barely scratched the surface of what’s possible here, and developers have the opportunity to invent a whole new range of scenarios using the software and the Managed API SDK (see below) that allows Visual Basic and C# development, so we’re really excited to see what’s going to come out next!

Windows SideShow for Windows Mobile Developer Preview released! - MSDN Forums