I've been eagerly waiting for the next release of Quanta and its WYSIWYG mode (called "Kafka"). I'm hoping it'll be in KDE 3.2. However, looks like Lindows might beat them to the punch with Nvu. Yet, while I'm confident Quanta will support valid (X)HTML, Nvu only says "reliable." Here's hoping the W3C QA project and WASP sends them some encouragement to do the right thing!