I have been developing a web map viewer for our agency over the past few weeks to a month. I started with the showcase map template and have been adding to it ever since. I am not a programmer by trade, but know enough logic to get me by. Using the code within the interactive SDK, coupled with specific questions I've asked here, I've found nearly all of what I've needed. Not to say I haven't been frustrated with pesky bugs, but the support team has been a breath of fresh air. I was very nervous choosing the Silverlight platform over the Flex platform, because I initially thought that Flex got much more attention than Silverlight ever did. This may still be true, but I have been very pleased to see the presence of ESRI in many of the threads that I've looked into for ideas and answers to questions.
Just my .02 😄