I've been experimenting on iOS with the SensorTag and have posted some code at https://github.com/sgruby/BluetoothLEApps
While many of the concepts are the same as the TI provided code, I believe it is a little cleaner and easier to read. In addition, it is much faster and reliable when connecting (on iOS, service discovery should stop before making a connection). The provided app continuously displays temperature, pressure and relative humidity. In addition, it allows you to set alarms for high/low values.
All the source is released under an MIT license.
Feel free to fork it and use it in any project.