There's lots of positive momentum around services like Microsoft BPOS and Microsoft Online, as well as Partner hosted solutions. One of the challenges presented, is that one size does not usually fit all. 

Given our SharePoint Governance kit was designed to work cross server farms (to address common scenario’s like Extranet / Internet deployments, or Global Enterprise),  we fortunately can support the bridging of On Premise SharePoint with Hosted SharePoint.

What's unique about this, is that using the Governance Kit, the physical location of SharePoint farm is transparent to the end user.  Based on the provisioning rules, the user's site will be placed in the correct farm and namespace based on the governance model.  But the site directory and team sites navigation menu will show these sites for the user to access, just like any other SharePoint site.

But one consideration, is that currently this will only work for BPOS dedicated or Partner hosted, where we can install the Governance Kit as BPOS Standard does not allow 3rd party software to be installed.
Are you looking at hybrid models, with SharePoint farms being located on premise, and hosted data centers from Partners or Microsoft ?