Instagram: We have 5M users, nearly 100M photos

Mobile photo startup Instagram is still growing like crazy, according to TechCrunch. The San Francisco-based company says that it now has more than 5 million registered users, that those users add 896,000 photos per day, and that the service will probably crack 100 million total photos sometime this week.

With massive funding, Color aims to reinvent mobile photos

After the South by Southwest Interactive conference last week, you’d think the world would have its fill of mobile social networking apps. But here comes another big launch, this time of a free iPhone and Android app called Color.

VCs flocking to mobile photos: Instagram raises $7M

Instagram, the startup behind a popular iPhone application for editing and sharing photos, just announced that it has raised $7 million in funding led by Benchmark Capital.

Week in review: Skype outage affects tens of millions

Here’s our roundup of the of the week’s tech business news. (It’s shorter than usual, owing to the fact that there’s less going on during the holidays.) First, here are the most popular stories VentureBeat published in the last seven days:

Foursquare, Gowalla, Instagram: Mobile photos are everywhere

It’s been a big week for numbers about photos. Yesterday, location-based service Foursquare launched the latest version of its app with support for photo-sharing, and chief executive Dennis Crowley said later in the day that the service was already approaching one photo uploaded per second. Competitor Gowalla said today that its users have posted 1 million photos. And mobile photo app Instagram also said it has hit 1 million users.

Dodging Twitter, TweetPhoto becomes photo check-in social network Plixi

TweetPhoto, the company that allows its users to share and interact with photos across Twitter and Facebook, is announcing Tuesday that it has changed its name to Plixi. The company is also moving towards being its own social network, though leveraging Twitter and Facebook, for creating “collective memories” around places and photos.