Stream all audio from your desktop to your Android phone
I've tried SoundWire before, but there were quite a bit of stuttering from time to time. WiFi Speaker on the other hand worked fine on my crappy backup-of-a-backup Alcatel OT-990 phone (running a custom Android 2.3 build). It lags behind quite a bit (several seconds), but I only want to listen to background music this way, so it's fine. And there's no stuttering, even though I've tested it with a very old SMC soho router between the two devices.
And since I've had a problem of the phone not detecting the sound system connected to it, I've installed the awesome toggleheadset2 widget to force it to output on the 3,5" jack output. Yay!















