Currently I'm working on Web project that is built using ASP.NET Web Forms. We want to start building new pages using MVC framework.

Looks like running MVC and Web Forms side by side is doable
[Running ASP.NET Webforms and ASP.NET MVC side by side](https://weblogs.asp.net/rajbk/Contents/Item/Display/107)

I'm curious if there are any problems or gotchas that I need to plan for.

I'm running on ASP.NET 4.0 and planning to use MVC3.