We have scoped out a full portal strategy on HP hardware and using Microsoft software. The software tools directly address each of our portal needs including:
MS Content Management Server
MS Commerce Server
MS Sharepoint Server
MS SQL Server
MS .Net technologies
SOA - not sure what the difference really is if this is constructed proprietary vs open source. My assumption is WSDL, SOAP, XML is what to use...
My question is - hypothetically if we wanted to completely change direction and go OPEN SOURCE instead of proprietary - how difficult would this be? What solution set is out there?