So i was recently considering switching to the iPhone 4 from my blackberry 9300. I noticed that there is no add-on for facebook, twitter, etc. except the blackberry social one. I don't want to get a plan with data because i don't use e-mail or the internet on my phone (except with wifi but i dont want to get data since i wont use it very often). Does anyone know how to get social networking for iPhone without buying a data plan?