Improving the user experience using visualforce

One of the biggest question customers have when implementing a CRM solution is how much can we automate the process? Considering that the representative will be spending 8-9 hours on the computer operating on CRM, the biggest question they ask is, 'Are you making my life easier or harder?'
During a recent conversation on twitter this question popped up again. Is it possible to auto-populate the values on a visualforce page on choosing a lookup? Lets say you are designing a custom contact...



[[ This is a content summary only. Visit my website for full links, other content, and more! ]]