From Scripting News - Google and content modification. After a few days reading comments both pro and con, trying out the software, thinking, I put together this document which explains why authors and publishers should tell Google to back down. Their toolbar takes a step down a treacherous slope, that changes the way the Web works as to make commerce, journalism and scholarship impossible. It will render agreements entered to on the web null and void. It invites Microsoft, with it's virtual monopoly in browser, to do the same, to the detriment of the market, and even Google itself.
Read the document here