Texas Instruments brings together Bluetooth, Wi-Fi without interference: TI has designed a set of chips that have co-existence in mind, especially focusing on maintaing voice-quality Bluetooth-based conversations while using Wi-Fi for data transport.
A TI spokesperson wrote in to advise me that these chips comply to the Personal Area Network co-existence set of best practices developed by the IEEE: 802.15.2. He noted that 802.15.2 isn't a standard, but rather recommendations