Engadget - Yep, HP's on a tear today. In addition to unleashing a trio of redesigned Envy laptops, a refreshed dm4 and one aggressively priced Ultrabook, it has some news to share on the accessories front. The outfit unveiled its Wireless Audio system, which lets you stream audio files from your PC to as many as four compatible speakers. In terms of setup, that photo up there says almost everything: you plug a thumb-sized dongle into your USB port and a larger receiver into the speaker.
