Post them for the community to answer! http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=537&SiteID=1
Development with Microsoft technology has largely been about community on MSDN - although many people feel the spirit is in contrast to that, it's not! You can find a community bulletin board for every product at Microsoft (or just about every product). Well, we now have one for Virtual Earth. Many of us from the product group will pop in on occassion to answer questions, but the idea is that you've got some wild, imaginative ideas and we're not always the right ones to answer the questions since we're focused on making the product and not extending it like you do. So, hold hands, sing cumbaya and be one with Virtual Earth development.
Other useful links:
MapPoint Web Service Forum: http://msdn.microsoft.com/newsgroups/default.aspx?dg=microsoft.public.mappoint.webservice&lang=en&cr=US