I'm not sure a Bitcoin focused social network would be viable at this point simply because the economy is too small. At the same time though, I think throwing someone to the forums here could be a bit daunting as a first introduction to bitcoin.
My advice is focus on getting merchants involved in the economy: formal brick and mortar merchants, internet merchants, mom and pop merchants, tabletop individual merchants, everyone selling something. Develop a pitch that explain what bitcoin is and how it could benefit them. Focus on benefit of bitcoin while not totally trashing the dollar since that might make you come off as loony. Remember that every merchant that comes on board adds legitimacy to the currency and will serve to inspire consumer confidence. Remember that the best way to convince a merchant is to show results. So offer your own goods and services for btc and show them the results YOU get and how YOU'VE invested in the currency.
Talk to friends and family about bitcoin, get them involved, evangelize a bit. Always focus on why it's a better alternative to their fiat even if you don't go into exactly what fiat is and why it's bad (many people don't care. They just know money works).
Eventually, you'll see the economy start to grow and you'll be able to buy more and more of your own needs in pure BTC with no need for conversion at all. At some point, we'll reach a tipping point and the economy will flourish.