NBC is running a 3-minute promo of What The Office Did On Their Summer Vacation.  I think it is a clever way for the show to explain the hiatus, as well as being entertaining (for essentially a commercial).

Some tibits from the promo are that Karen isn't gone (at least yet) even though Jim dumped her (and rumors that Rashida Jones was leaving for a pilot), and that the first 4 episodes will be an hour long.  Though better than the faux 'supersized' episodes last year, I wonder if The Office works as an hour long episode.