Silverlight on sharepoint

Recently, i have a silverlight project being handed over to me, i was supposed to evaluate the security concerns that might go against my client's policy. I started off adding the feature into my site, saw the new web part.. added the web part to my site, but all it shows was a blank white space, it can't be clicked, when i right click, there's only a generic silverlight context menu. A bit of searching on msdn/technet, i saw this post: silverlight mime, did as they said and the fanciful silverlight components starting to load :)