Bitcoins can currently be bought with cash through private individuals in the Pittsburgh area. A list of local sellers can be found on the Local Bitcoins web site:
You may also buy Bitcoins by transferring money from your bank account through a web site called CoinBase.
You can also earn tiny amounts of BitCoins by filling out surveys online, watching ads and visiting web sites. These are known web sites to earn free Bitcoin:
Finally, you can attempt to mine BitCoins yourself by downloading a BitCoin mining client like [referemce]. However, you need a very powerful graphical processor to have any chance of successfully finding the next block.