After four years as a solo practioner, Johnson invited Alan Ritchie to join him as a partner. Ritchie had been a partner for many years in the Johnson-Burgee office and was the partner-in-charge of the AT&T building and the 190 South Lasalle Street office building. In 1994 they formed the new practice of Philip Johnson>Alan Ritchie Architects. During the next ten years they worked closely together and yet again explored new directions in architecture , designing buildings as sculptural objects. Some of the buildings that expressed this were the Chapel of St. Basil at the university of St. Thomas, the Cathedral of Hope in Dallas, the Habitable Sculpture (a 26 story apartment tower in lower Manhattan), The Children Museum in Guadalajara, Mexico, The Chrysler Center and DDC Showroom in NY. One of his last designs with Alan Ritchie, completed after his death, was the Urban Glass House , a condominium building in lower Manhattan which was an urban expression from his own earlier work, his famous Glass House residence. The final building he designed with Richie was the Pennsylvania Academy of Music building in Lancaster, Pennsylvania , which was completed in 2008. Alan Ritchie now continues the Johnson legacy and design excellence and continues to explore the many ideas they developed together.  . 
Given the open-ended length, it is possible to cover more than one meaningful activity, project or accomplishment. However, the fact that HBS has been consistently trimming down its essay set in recent years likely indicates that a 1,000-word essay would be unwelcome. Moreover, it may be tempting to draft a lengthy essay on traditional subjects such as your career goals, greatest successes, and interest in the school; however, your need for an MBA or specific career goals may be adequately covered in your other materials. This should help to narrow your focus, select your topic and craft a succinct essay. You should take care to steer clear of simply “recycling” essays from HBS’s peer schools, such as Stanford or Wharton, as the adcom will probably spot such an essay based on the highly unfocused nature of the HBS prompt and will not respond positively.
On 7/26/13 Cornell updated their Deadlines page to clarify that they will still accept “late” applications through April. This basically moves them back to a 4-round admissions season all over again! It’s good to see this flexibility but it’s a little baffling why they’re doing it this way. Why not just keep four rounds? Maybe it’s because they’re trying to accommodate all their admissions under the same schedule, and the One-Year MBA starts in May so they can’t have a round hit that late in the season and still get people in there.