To make my previous comment more precise: The RT2860 driver seems not to be included by default in the latest nightly Live CDs yet, or is not configured properly. The Live CD should include this driver out of the box.
To make my previous comment more precise: The RT2860 driver seems not to be included by default in the latest nightly Live CDs yet, or is not configured properly. The Live CD should include this driver out of the box.