Will you be waiting to release Orchard version 1 until MVC3 goes RTM which I understand is expected sometime around:
"ASP.NET MVC 3, WebMatrix, IIS Express, SQL Compact Edition 4 and more will all be released in mid-January. Visual Studio 2010 Service Pack 1 will finalize a few months later." - Hanselman
I hope you can wait as it would be nice to have at least both as production releases around the same time.
Post Version 1 how long do you think it will be before the next release. Should I be waiting 2-3 months or maybe 6 months?