Pitch HN: Simple tool for small businesses to send SMS, email and Tweets

I want to be able to add customer's emails and cell numbers and send them simple marketing messages. I'm sure this is something that lots of small businesses would like to be able to do too. I was about to start fiddling with Campaign Monitor and Twilio when I thought other small business can't do that. Ideally this would integrate with Twitter and FB too. Is there anything out there that's built for simplicity rather than the enterprise market? I've looked at Cotweet and Hootsuite but both are for brands/big organisations. I want something that my mum can use. I'm thinking along the lines of restaurants, hotels, hairdressers and takeaways.