In response to a comment on my Scrollable Region example, I wanted to see if scrollable regions in CSS work with Silverlight. It seems to work ok if you leave room for the scrollbar (e.g. if the Silverlight asset is 160px wide, make the div 180px or so wide). For example:
Scrolling in CSS (overflow: auto;)
Scrolling in CSS (overflow: scroll;)
Grab the example and let me know you what you think!