Trends in the use of the Internet in recent years, collectively coined Web 2.0, have precipitated changes in modes and uses of writing online. Blogs and social networking sites provide new opportunities and incentives for personal writing. This reading-to-write culture requires use and development of language skills. The challenge for language teachers is to extend students' Internet world beyond their first language, to leverage participation in the read-write Web as a learning opportunity for language self-development, and to find means to link informal and recreational writing with formal and academic writing. This article describes new tools and services that facilitate online composing, editing, and assessing writing. (Contains 34 online resources.)