Google Challengers

Good Businessweek piece : Can Google Stay on Top of the Web? As Bing, Facebook, Twitter and less well-known upstarts nip at its heels, Google has hundreds of wizards racing to come up with smarter answers. Their new Wave package bears looking at. They always have the option of buying, and in some cases it surprises me they have not. For those of you who do not follow Google competitors for attention on the web, and this is beyond just search, this is a good overview.