Yahoo's rumored social network, dubbed "Mash," has arrived. The company started inviting people outside the company to test it on Friday.

Will Aldrich, the head of Mash., says in the Yahoo! blog post —”Mash is a new approach to online profiles. If you’ve used other online profiles before you’ll feel at home in Mash. But there are some new twists that make things a little interesting and, we think, a lot of fun.”

1. You can make starter profiles for your friends. Think: “first round’s on
   me.”
2. You can leave your profile open to contributions by trusted friends.
3. You can customize your — or your friend’s  — profile with modules
   from a growing gallery of apps.

"One last note before you jump in: Mash is still pretty raw--there are bugs and we haven't gotten to several of the features it really should have. We need to hear from you about where to focus our efforts."

Yahoo, Mash, Social Network, Social Networking, Social Media, New Startup