>I want to start on web development. What should i learn first or just jump to .NET platform ???

Here are some resources to check out:
http://www.west-wind.com/articles.asp
http://www.hentzenwerke.com/catalogavailability/intvfp.htm

Products:
http://www.west-wind.com/webconnection/
http://www.afpweb.net/
http://www.eps-software.com/voodoo/index.ewb

I don't think it is an either/or decsion. You can start using VFP7 to build web applications while waiting for VS.NET to be released.