Proxys for demand can be an excelent pointer to precious metal price direction. I have found an excelent proxy for demand is Ebay. Whilst they do not make data freeley available (you have to buy the historic sales data) you can use You must be logged in to see this link. which will show you the current premiums that gold, silver and platinum are fetching on Ebay.
Premiums on precious metal have recently dropped right back (7 to 10% on gold compared to 30 to 40% back in October 08) on last weeks sell-off. Looks like an opportunity to me....