PhoneDog: Thought September was going to be a busy month in the world of mobile? It's getting busier today, as HTC just sent us an invitation to "see what's next" at an event that it'll be holding on September 19. The gathering will be taking place in New York City, with the festivities officially kicking off at 11:00 a.m. ET. Unsurprisingly, there's no mention of exactly what HTC is planning to show at the event.