It doesn't work on an iPad yet. It's our first web Office release, it's still a little rough, but it's definitely something we're putting a lot of engineering w

It doesn't work on an iPad yet. It's our first web Office release, it's still a little rough, but it's definitely something we're putting a lot of engineering work behind to improve. However, you don't actually need Silverlight to use it (I'm not sure what they're using it for), I've used it on Chrome in Ubuntu and it worked just as well. Any new'ish browser should work.