The engadget story is (as usual) twisted horribly against Nokia.
HTC intentionally arranged their event in the same city at the same time as nokia world knowing they wouldnt get half as many attendees otherwise, then drove up a load of HTC-branded busses to right outside Nokia World to offer people free transport to HTC's event from Nokia's.
Following that, nokia "hit back" with some balloons and free goodie bags poking a bit of fun at HTC.
Call it childish or call it a bit of tongue-in-cheek PR on the part of both companies, but jeez who cares, light-hearted PR at the expense of another company is nothing new, and is imo a positive thing.