Today I received an email about numerous unanswered questions on the forums about errors when trying to retrieve data from web services that are not on the same server as the one serving the Silverlight application (Cross-Domain).
I have a tutorial about to be released (today?) that deals with every aspect of this except the one that is causing the problem: cross domain, but that is okay, because it brings everyone to the same starting point.
Unfortunately, I am also going away for a week: to present on Silverlight at VS Live San Francisco and then to Redmond. But that is good too, because if the problem is not resolved by the time I hit Redmond, I'm seeing just the right people to ask.
In the meantime I'll post the question to an internal newsgroup and let you know if I receive any word. Look for further posting no later than a fortnight, but almost certainly sooner.