" is getting a lot of attention, particularly in techie circles,' said Dan Olds, an analyst with The Gabriel Consulting Group. "Since these are the circles that and employees circulate in, all of this attention must be causing them at least a little bit of anxiety."

He added that no one at the other social networks should be in a panic, but they should be paying close attention to the momentum that seems to be building.

"We're not talking 'waking up in the middle of the night screaming anxiety,' " said Olds, "It's more of the 'tossing and turning before falling asleep' variety at this point."

After launching as an , has left its Invite mechanism open for a few more days. Users are finding slews of notices that new people have joined the site and have added them to their circles. Headlines are popping up proclaiming on both tech and mainstream news sites that Google has overcome its social networking slump, while other sites focus on Google+ taking on , or Google+ taking on Twitter.

Google+ is filled with posts from users commenting on the new service, offering tips to other users and making suggestions to Google. Some comments include tips on how to organize contacts or how to scroll to the next post in a user's stream. Users are also posting funny videos and cartoons about Google+ taking down Facebook and Twitter.