I'm about to use it for serious development. We're planning on using it exclusively so I haven't paid much attention to how well it will integrate with Java. My

I'm about to use it for serious development. We're planning on using it exclusively so I haven't paid much attention to how well it will integrate with Java. My feeling is that we'll be able to develop a much richer front-end in Silverlight in less than half the time it would take in Java/Ajax. Plus we won't get weird lags and delays, and we can do more extensive multi-threading type stuff.