Twitter can help you to drive a good amount of visitors to your blog if you have numbers of genuine followers. Twitter Power users attract thousands of visits from their followers just from twitter. You can share your articles manually to twitter's home page or by installing a twitter share button in your blog posts. But in both the ways you are tweeting manually! How about making this twitter update, an automatic process so your blog updates are tweeted automatically to your twitter followers. I reviewed many sites to do this thing and finally found 4 best sites to do this for us AUTOMATICALLY. Hope you'll like it! Read here: 4 Ways To Tweet Your Blog Posts Automatically [RSS to Twitter]
Yes, I also do use twitterfeed It's RSS Feed when i post anything on my blog it's automatically post also in twitter with title and tinnyurl you can set how ofen the feed will visit your webiste it;s really very good and easy
twitter is for conversations, not for spam which is exactly what you're trying to suggest I wouldn't look into using a feed, use twitter to network and you'll get some traffic that way