Lets say if you have your focused customer as college / students then creating then creating the application in community based websites will be good.

What is community on internet?

There are different social community based websites. eg. facebook.com, myspace.com, orkut.com, twitter.com. As these are mostly visited and popular websites. Its all depend on the region where you belongs to. As different country have different sets of liking for visiting these social connecting websites. so they already have collected so many visitors for their websites. now lets say if we have created/selling something then reaching to these people will be easier for you.

As these websites having their different application developement tools where we utilize their application developement and creates the websites according to customers need. We have great understanding SOAP and API to creating the application. and creating the application is easier for our team.