You can just adapt your existing VFP application(s) to the Web using FoxInCloud (http://foxincloud.com/).
You won't need to learn the web, FoxInCloud will take it in charge for you.

Regarding figures, FoxInCloud applications typically serve 500,000 AJAX requests/month on 50+ forms/1,250 event handlers/35 reports with less than 2% code rework.

HTH,
thn (FoxInCloud)

>I'm planning to begin developing web applications but my main and almost only programming language I know, and work with, is VFP 9. So I guess I should adopt one of the mentioned above. I would like to know which one of them is the easiest to learn, the stronger to support a lot of concurrent users. Or which one would you recommend?
>
>TIA