Cleanup on aisle 3
My weblog now validates as XHTML strict, and my implementation of the Comment API will now produce and consume XHTML bodies.
Users of back-level browsers may find that the comment form doesn't remember you any more. If this function is important to you, you will need to find a browser that passes this test.
My WSDLs for the comment API (example) simply declare xhtml bodies as mixed sequences of any for now. Let me know if it would help if this were restricted in some manner.