I just visited a site which required Microsoft's Silverlight plugin (Ryanair's route checker).
Given that I was running Firefox 3 on Ubuntu I wasn't expecting much but I clicked the "install silverlight" link anyway, and was redirected first to Microsoft and then on to the open-source Mono project and Moonlight.
I knew that Moonlight existed, but I wasn't expecting that kind of endorsement from Microsoft. If this is the kind of thing that the deal between Novell (who sponsored/developed Moonlight) and Microsoft leads to then maybe my thoughts on that process have shifted a little.