One of the areas on the main floor is called “Cabana Sessions.” It's a bunch of tables, with one for almost each of all of the current and upcoming server, developer, and platform products. The tables are manned by a total of 500 Microsoft Team experts--these are the people who've worked on these products, or support them. You can walk up to any of them, and ask questions. Many of them have their laptops setup so you can run some code, or see how something works.
So--If you have a question you've always wanted to ask someone at microsoft, post a reply to this blog post. I'll try to find the right person, and ask them your question. This is for developer tools, servers, and OSs only--sorry, no Xbox 360 experts.