Browser-based 3D virtual world SmallWorlds has announced its plans make itself available to the public with a public beta launch on June 2nd. Starting today, SmallWorlds is accepting registrations for the beta at its official site.

Billed as "the first web-accessible, casual virtual world designed for mass market appeal," SmallWorlds is a free-to-play MMO targeted at the 13-year-old plus demographic. SmallWorlds aims to reach a broad demographic by doing away with application installs, intimidating user interfaces, and limited customization options.

Users will be able to access SmallWorlds' 3D spaces using just a URL, thanks to Adobe Flash Player. Friends can be invited to play a multiplayer game, watch a video, or just socialize with that URL. SmallWorlds incorporates elements from popular sites, allowing users to put up Flickr posters and picture frames, watch YouTube televisions, and listen to Last.fm stereos.

Though SmallWorlds won't require paid subscriptions, premium accounts are planned for the MMO's official launch. The premium accounts will give players access to new features, such as virtual pets and a voice chat client, for a monthly fee.