Myxer, a stage 1 ventures portfolio company, announced today an agreement with INgrooves that provides Myxer’s userbase access to several hundred thousand ringtones from the world’s leading independent artists.

"With over 15 million users, more than 22 million mobile downloads a month, and a catalog of over 1.5 million mobile ringtones, wallpapers, videos, and games, Myxer is the largest and fastest growing site for mobile content in the U.S. today," said Myk Willis, CEO of Myxer. "With our new INgrooves distribution partnership we’re able to add top favorites to our catalog and provide our mobile community with incredible choice in personalized content."

Additional information can be found at this press release.

Ringleader, a stage 1 ventures portfolio company, recently launched "media stamp" - an advanced tracking cookie for mobile devices. Forbes covered this promising technology in a recent issue:

Soon your phone might share a lot of information about you with advertisers. And although that might make you nervous, some advertisers hope it will also unleash a flood of more targeted, and thus more useful, ads. This week, Ringleader Digital, a New York-based mobile ad network is launching an experimental version of what it calls a "media stamp" –a technology it hopes will become as widespread as "cookies" on the Web.

The complete article can be found here.

OnePIN Inc, a stage 1 ventures portfolio company, has deployed its mobile contact sharing and social networking platform with more than 65 service operators and 16 million users.

Focusing on the GSM platform, OnePINs CallerXchange is not a downloadable application, but an element of a phones operating system, installed directly on the SIM card. The benefit of this non traditional approach: OnePIN is able to approach sales through SIM card manufacturers, rather than direct to consumers, carriers or even handset manufacturers.

Additional details can be found in a recent MassTech article.

Skyhook announced that it is incorporating GPS support into its geolocation service to get an even more accurate fix for location-based services. Until lately, Skyhook’s geolocation service, used on Apples iPhone and other mobile devices, has used Wi-Fi hot spots to obtain a fix. But for all of the benefits of Wi-Fi, it doesn’t work in rural areas where hot spots are few and far between. Now Skyhook has integrated GPS support into its technology, which will allow Skyhook to cover more ground with its geolocation service.

"Our technology works great in populated areas," said Ted Morgan, co-founder and CEO of Skyhook. "But on the open road it’s more difficult. Now with GPS integrated, iPhone users, for example, can get turn-by-turn navigation anywhere they go."

Details can be found in the press release at Skyhook Wireless.

Additional coverage can be viewed on the cnet site.