Keeping up with every RSS feed item, tweet and emailed link is hard enough for anybody, let alone someone who's trying to run a business. That's why each Friday, ReadWriteBiz rounds up the week's most important tech news and insights for small and medium-sized businesses. Twitter revealed the latest piece of its monetization puzzle Monday by announcing that it would be rolling out a self-service advertising platform for small businesses next year. Sponsor This new model will supplement the revenue brought in by Twitter's "Promoted Tweets" offering, which targets large companies for a hefty price tag.