If you still haven’t had a Pinterest invite that’s no longer a problem.

Today Pinterest announced that it was dropping its invite only approach to getting a Pinterest account and opening itself up to one and all.

The invite only approach has been in place since it launched back in 2010 first as a closed and then an open beta.

The move to open registration follows a redesign of the social pinning board that saw the introduction of new categories designed to make it easier to curate.

Pinterest was estimated earlier this year to have more than 17 million monthly visitors.  In June ComScore said Pinterest had racked up +4377% growth between May 2011 and May 2012. It also confirmed Pinterest as the fastest-growing social network as of Q1 2012.

Throwing registration open to all is likely to help accelerate that growth further, which has helped make it the fourth biggest social network by size in the US.

Pinterest made the announcement in a blog post earlier today:

Today we’re thrilled to announce open registration!

For those of you who haven’t joined Pinterest yet, this means you can sign up without waiting for an invite: all you have to do is go to Pinterest.com to get started. In addition to using your Facebook or Twitter login, we’re also opening registration so you can sign up with just your email address.

We’re really excited to have the capacity to offer Pinterest to more people and if you’re a Pinner with friends who’ve been waiting on the sidelines, we hope you’ll let them know. Happy pinning to everyone!