When we do complex smartlist building or when we want to see what's happened with that lead quickly in Salesforce, sometimes we need to go back and forth between the information that Marketo shows on the Lead Detail and the information that Salesforce has - and it's becoming a chore to scroll down to find the 18 digit ID, copy and paste it into a different browser window, prefixing my particular salesforce domain (na1.salesforce.com)... I think it'd help out alot of people who do this type of work just to include a hyperlink that opens up a new tab with the SFDC record. It would be a step closer to a seamless integration with Salesforce.