A maintenance update to silverlight 2 beta 2 was released via Windows Update today, bumping the runtime version number from 2.0.30523.6 to 2.0.30523.8.
From the KB Article:
This update improves stability, media streaming, and the auto-update component. This update also improves support for Mozilla Firefox 3.
I’m still hopeful that Silverlight 2 RTM will have a Trigger construct of some kind. But I’m convinced ElementName bindings, Data Template Selectors, and Markup Extensions won’t come until 2.5 or 3.