My first Rails Application

I have finished 'Agile Programming with Rails' today , and thought to develop an application. Now the problem was to decide what type of application should i start with, finally i decided to develop a site that will provide a platform to language lovers. Means Language tutors can search Learners and vise-versa. They can contact each other, use skype and yahoo for their online classes. Also there will be many more featurs, I will post those as soon as i figure them out..