More data usually beats better algorithms is an interesting post about more sources of data used together with simple algorithms do a better job then complex algorithms. Where this is interesting to me and my customers is that we need to find or develop data sets that better support the customer's users more successfully using the customer's site.
Most high-end web development shops are not yet at the point where their technologies, talent, and experience alone are not enough to turn a lead into a customer. However, we should be thinking about adding data to this mix now.