Limbo, fastest growing mobile social networks in the world, now available globally to 3.5 billion people in more than two hundred countries. Limbo was among the first location-based social networks to launch an iPhone application this July, and becomes the first to expand to international markets.

Limbo’s international growth comes just weeks after text message-based services such as Twitter and 3Jam pulled availability from international markets due to mounting text message costs.

Limbo’s expansion to these markets makes it the world’s only location-based social network where friends can connect across the globe, jetsetters can continue location sharing when their travel takes them abroad, and mobile phone users in almost any country can now take part.

“Mobile social communities have no boundaries, and neither should Limbo,” says Limbo’s CEO Jonathon Linner.

Mobile phone users from over two hundred countries can now join Limbo’s community through the Internet or mobile web to broadcast where they are and what they’re doing, socialize with other members, or play games against each other. The number of people accessing the Internet from their mobile phone exceeded half a billion this year, according to IDC data.

The Limbo iPhone application was initially released in the US, and is now available in all 62 countries that support the iPhone.