Until we get a single good feedback mechanism in place, please feel free to provide feedback on the experience of developing Windows CE native applications using Visual Studio 2005 (a.k.a. “Whidbey“) community technical previews directly via my blog's feedback mechanism.  Providing feedback in this manner will ensure that we see it promptly, as I will forward all such feedback on to the rest of the team, and occasionally post summaries of what we are doing in response to the feedback here.  Note that I do not reply directly to questions though, so this may not be the best mechanism to questions answered promptly though.