Tracking number feature request(s)

Currently, providing a tracking number to a buyer doesn't post it on the order page so the seller cannot see it. At the very least it would be really nice if it were available to both parties.

In addition, it would be extremely convenient for the entering of the tracking number to automatically generate a link to the USPS/UPS/etc page. All tracking numbers follow the same format so it should be pretty easy to write an algorithm that can determine which carrier it is from.