Right now we're moving from a SharePoint 2007 and SharePoint 2010 farm, my current list of solutions implemented in the 2007 farm numbers somewhere in the 100's. A few ideas I had for moving them included:
1) PowerShell scripting the entire thing, building a script to loop over every .wsp, .cab, etc. and deploy.
2) Any third party utils or pre-built scripts that can help in this?