Microsoft Silverlight is a cross-browser, cross-platform, and cross-device plug-in for delivering the next generation of .NET based media experiences and rich interactive applications for the Web. Silverlight 2 beta includes innovative new features like Deep Zoom, more than 40 new controls and a rich .NET base class library of functionality.

For a look at some of the applications using Silverlight check the following -


Silverlight Showcase

Silverlight 2 Beta

Comments
on Mar 15, 2008
If this something that once out of beta that all users of Microsoft will be automatically upgraded to? I think that I have been asked to upgrade when using the Microsoft update pages, could be wrong.  
on Mar 16, 2008
I know one thing, it sure Missed up my system! I'm glad i made a restore point before I installed it. XP Pro sp3
on Mar 16, 2008
I've had Silverlight since it was first released to the public. No problems here...XP SP3
on Mar 16, 2008
Silverlight is a mass of distorted programing. Good thing my Virus protection caught it, or I'd be looking for a new PC. I hate to be fooled into downloading programs that do not work.....Soooooo I am here to say to say, if you want problems on your computer and have nothing else to do but to get it repaired....download Silverlight. If not, stay away from it!!!!!!!
on Mar 16, 2008
I haven't had any problems with Silverlight. No viruses, no ad/spyware.
on Mar 16, 2008
i've been running silverlight since the first day the beta of version 1 was released and haven't had a single issue with it yet. actually, i think it kicks java and flash in the nads.
on Mar 17, 2008
No issues with Silverlight here on Vista using Firefox. I haven't really gone to many pages using it yet but it seems to be a pretty cool piece of software.
on Mar 17, 2008
haven't ever had a problem with it here either.
on Mar 17, 2008
At this point . . does Silverlight do anything for any of you?
I have the beta . . but other than the front page of Microsoft's download site haven't seen squat.  That page didn't do anything that amazing for me either.
on Mar 17, 2008
Hmmm, a very interesting question!