Mobile social network Limbo concluded a series of interactive games this month in support of Verizon Wireless and Nokia's sponsorship of the summer Batman blockbuster, "The Dark Knight."

The promotion centered around Verizon Wireless' exclusive mobile movie content and the new Nokia 6205--The Dark Knight Edition phone. In the games, which Verizon Wireless subscribers played via text message, mobile Web and online, players took sides to battle for weekly prizes including the Grand Prize of a Dark Night in New York City or Las Vegas and a Nokia 6205 -- The Dark Knight Edition phone.

"Verizon had never sold Nokia phones and when the two partnered they decided to generate a lot of bnuzz around it through the sponsorship of the Dark Night movie," said Rob Lawson, chief marketing officer at Limbo, San Francisco.

"The campaign ran in print, online and on television and the mobile aspect was to bring all the interested people into one sort of mobile community," he said.

The result of the mobile initiative was 40,000 sticky deeply engaged consumers who sent 100 messages each on average.

The campaign promoted the phone through exclusive ringtones, video clips and wallpapers as well.

Players of the game built personal profiles as Batman or The Joker and chatted with each other within the games at www.fightforgothamcity.com.

Each week, Verizon Wireless subscribers played Limbo Grab as Batman or The Joker for the chance to win that week's prize.

Players texted the keyword BAT to Limbo's 41414 short code to "grab" the prize and take virtual possession until another player grabbed it away.

The object of the game was to use the allotted 300 grabs to accumulate as much "time of possession" as possible.

Whoever accumulated the most time won that week's prize.

With each grab, players received a text message response that provided game status and a message about the movie, mobile content or branded phone.

Verizon Wireless, Nokia and Limbo increased the interactivity of these games by including a personality test, allowing players to discover whether they belonged on the side of Batman or The Joker through a series of seven questions.

Recently, Limbo added a new set of location-based tools to its mobile community.

The new tools, Who, What, Where and Shout, help members connect with their friends by sharing where they are, who they're with, and what they're doing.

These tools are available to anyone through Limbo's website, WAP site or SMS. The new tools can add enhanced location segmentation to a client's campaign.

"Verizon and nokia used mobile because they wante to be seen as pioneering," Mr. Lawson said. "They produced a mobile environment for the user to be able to download stuff to the new phone. Users were brought together using the mobile phone."