>If you have some application running smoothly for years, why a company (esp. small one) should decide to upgrade, if they basically get the same product but still have to pay few days of consultant work?
>

Yep.

If you want to sell upgrades, CONVINCE THE COMPANIES THAT VFP IS A CURRENT AND SUPPORTED TECHNOLOGY!

All corporate America (in my case) has heard since VFP 3 is how great Visual Studio (VB) and .NET is and how they should be using those tools.

You won't sell much VFP that way.