Steve Weber, well-known author, seller, and blog writer, who has written two books about selling on Ebay, has two blog entries that talk about the latest ban against sellers giving any bad feedback to customers, even if a customer is dishonest or abusive. He agrees with me that this new policy will probably result in sellers being upset.
January 29, 2008
eBay bans negative feedback for buyers, cuts listing fees
February 02, 2008
eBay's Griff offers shaky defense of feedback changes
I think you'll find the articles and other people's comments here VERY informative and thought-provoking.Steve Weber's website