By Mikal E. Belicove|For Enterpreneur.com|February 9, 2010

Google Buzz — a social networking tool that allows Gmail users to share updates, photos, videos, links and more instantaneously online and on Android phones and the iPhone–made its debut today. By the end of the weekend, Google says all 175 million or so of its Gmail account holders will have access to the new service.

Already, just hours after its release, a number of pundits and media outlets are suggesting Google Buzz will compete with Twitter and Facebook, ultimately resulting in a third major player in the tweet/status update arena.

Early indications seem to suggest that the new service–which appears to be optimized for the mobile web–will be very useful for businesses that engage in linking their geographic locations to instant messages. Still, because Google Buzz is so tightly integrated with Gmail, the barrier to entry–if you want to use it, you have to be a Gmail subscriber–might be too high for a large enough number of users to gather and create a bonafide third player in the social networking landscape.

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