Have you upgraded to WordPress 2.1.2 and the wysiwyg (rich text) editor seems to be gone? I had this problem, but found the answers in the following three post threads.
1. How do I activate the rich text editor? The discussion at this url answers that question:
2. I see the rich text editor; I can enter a title; I can't enter any text. The following discussion answers this question:
3. I think I want to use a different rich text editor. Here's a discussion about that:
http://wordpress.org/support/topic/72202 best editor
Hope this makes somebody's day better!