In IE8, it seems that the Marquee tag isn't supported anymore. Need for a Marquee replacement got me into my first Silverlight tryout. Please note, this is done as a quick alternative to the Marquees that didn't scroll in IE8, with something non Javascript. I had to do it since I didn't find anything that's already out there, so, thought it might become useful to somebody else too.
It’s very straight forward, in the sense, I’ve used the DoubleAnimation control to achieve the rotation, by altering the "To", "From" and "Duration" properties. So, I guess, with little modification this can be made to rotate horizontally as well.
Sample code