On Wednesday, Pinterest announced open registration. Previously, the service was invitation-only.

Pinterest lets users organize and share things they find on the web. People use pinboards to plan their weddings, sow their favorite things, decorate their homes, organize their favorite recipes, etc. Users can browse pinboards created by other people and discover new things/get inspiration from people who share your interests.

If you haven’t joined Pinterest, you can sign up without waiting for an invite via Pinterest.com. In addition to using your Facebook or Twitter login, Pinterest is also opening registration so you can sign up with just your email address.

Once installed in your browser, the “Pin It” button lets you quickly grab an image from any website and add it to one of your pinboards.

With the “Pinterest for iPhone app” users can:
• Pin anything to their pinboards: memorable meals, places to visit, favorite movies, etc.
• Browse pins from people and pinboards you follow
• Repin, like and comment on your favorite pins
• Pin with your camera and add a location so other pinners can visit

More info and download link for the Pinterest for iPhone app (free) via Apple’s App Store here.

[Thanks to MacDailyNews readers too numerous to mention individually for the heads up.]