No doubt the implementation which requires a login is to prevent scrapers from (too) easily scraping Google SERP results in "alert"-level realtime level onto their sites to subsequently monetize it through Adsense.  Hmm... that would intrude a bit too much on teh GOOG revenue model :D :DAlthough logins are easy using the most common scraping / cleansing tools (Yahoo!  Pipes, etc....)Rob