>One of our infrastructure on a client site includes a .NET Web Service which uses VFP and WWC for the data tier. Today, a top IT in regards to the management of that infrastructure says that this solution is not scalable. They said to us that a global .NET solution is scalable. How do we react to that?

How much more scalable do they need than something like JFast or the EuroTunnel? For starters, how about the sidebar at the bottom of:

http://advisor.com/Articles.nsf/aidp/MATIV02

Or:

http://fox.wikis.com/wc.dll?Wiki~VFPSuccessStories~VFP