I’ve been pretty pleased with my Jawbone Icon headset. It has good battery life, clear audio, and is comfortable to wear for an extended period (once I found a loop that works for my ears). But Aliph’s claim that the Jawbone Icon could be upgraded with “apps” was underwhelming: None of the launch apps were compelling, and the app site itself remains in beta. But the company redeemed itself last week by releasing something I’d long hoped for: Bluetooth A2DP streaming audio support as an app.