This feature is being implemented in quite a lot of place, AFAIK, including web gtalk in gmail, google hangout, and Nokia N9. Nowadays contact number of a single person is quite large, even there's only 50 contacts it's hard to find the specific contact you're talking to. And this would somehow diminish the requirement about favorite a contact, just like quick dial in chrome and firefox: they don't allow you to directly add a page to quick dial. Display the most recent contacted people is quite straight forward. Reproducible: Always
*** Bug 308306 has been marked as a duplicate of this bug. ***