Where's the center of plain language on the web?
Try PlainLanguage.com by Cheryl Stephens. She's one of the pioneers of the plain language movement, and an awesome educator. You'll learn all you need to know.
What if I just want the FAQs?
Visit the Plain Language FAQ for an overview.
Are folks blogging about Plain Language?
Try Rapport, the plain language blog.
Read any good books lately?
Cheryl's latest e-book Plain Language in Organizations: An Action Plan, will help you really get a handle on the making plain language a part of your organization's communications plan.