Ben Riga has made a CRM 4 VPC available on partner source. In other words, you have to be a Microsoft Dynamics Partner to be able to download it. Unfortunatley, I am not, yet, so I havn't had the possibility to download it. When I start at WM-Data/Logica CMG, I will be however, and look forward to checking it out!
Here is the link if you have access: http://blogs.msdn.com/benriga/archive/2007/10/08/titan-now-available-to-all-dynamics-partners.aspx
CRM and SharePoint Consultant