Despite being the most popular and successful North American LBS application to date, generating a significant percentage of total LBS revenues, other opportunities exist beyond navigation, namely with location-enriched communications that leverage the inherent immediacy and presence power of the mobile network. T-Mobile US understands this...

While GPS enables traffic and navigation services, the core of the T-Mobile brand is about connecting our customers to the people who matter most.

TMo wants to

define and create experiences that enhance personal relationships and enrich all forms of personal communications, while also contributing to the value proposition of My Faves.

With the iPhone and Android there's a lot of focus now on location as an autonomous function and capability of the device, rendering the network to an irrelevant bit-pipe that has no role in the L part of LBS. That's certainly true for local search, navigation, publishing, and other device-centric Web applications, but TMo evidently knows that SIP-based immediacy in the network can be used in a way to add the "L" relevance back into the mix. Well done on them and werd up to my homey Tim Dunn.