<A HREF="http://news.zdnet.com/2100-9595_22-6124094.html?tag=nl.e589">Google has agreed to purchase online video phenomenon YouTube</A> for $1.65 billion in stock. The deal, which had been rumored for days, will dramatically improve Google's video-sharing service with one of the Internet's hottest properties in YouTube, which allows Net users to upload video clips and share them with the world.