I would love to see the Keyword Search feature brought back. I've spoken with many other hosts who would like to see this turned back on as well.
This was a great way for guests and hosts to find a good match and there are too many special interests to provide check-boxes for. Some guests, for example, prefer to stay in a kosher or vegan household. Others might want to stay with SCUBA divers or surfers.
Keyword search was a great way to make these connections happen. It was good for guests and for hosts! Many of us saw a large drop in page views when this feature was turned off, and the views have never returned to their prior levels. It seems that there are a lot of missed connections, with guest who are having trouble finding just what they're looking for.