Hey. I lurk around these forums a lot, so here's the first post.
Remember that you have to pay commission for each trade, so if you're trading with such a low amount, you may lose money unless your stock jumps significantly. Scottrade is on the low end with $7, but I think if you get a referral, you get three free trades (but they expire. I forget when... it's a month or so.). I think TradeKing has a minimum balance of $100 with $5 trades, but look around. There are a couple others with free trades when you sign up, but I think you need a minimum balance bigger than that.
Remember that you have to pay commission for each trade, so if you're trading with such a low amount, you may lose money unless your stock jumps significantly. Scottrade is on the low end with $7, but I think if you get a referral, you get three free trades (but they expire. I forget when... it's a month or so.). I think TradeKing has a minimum balance of $100 with $5 trades, but look around. There are a couple others with free trades when you sign up, but I think you need a minimum balance bigger than that.