Interesting article - give a very optomistic picture of downtown development: Apartment occupancy in downtown is 89 percent, according to data gathered in the spring by Central Houston, a group that promotes downtown revitalization. That's up from 83 percent the year before. With the top-class office vacancy rate now at less than 10 percent, developers are moving forward with residential projects to capture some of the anticipated demand. Another developer is proposing to buy and renovate the long vacant Texaco Building with more than 400 residential units.