[perivamsi]

Short answer: Use anything, it doesn't matter. All the major languages have good web frameworks these days.

Long answer: You will find comparisons between Rails, Django, ASP.NET MVC and a hundred other web frameworks all over the net. While some of the web frameworks are more elegant and mature compared to others, all of them are constantly evolving and growing. Your choice should depend on your core language skills. Which language are you comfortable in? Which language do you want to be coding in for a long time and possibly make a career in?

My suggestion would be to pick Python. There are plenty of hosting options for Python and Django. Have a look at http://code.google.com/appengine/