HOUSE OVERSIGHT 028635 "Even though we're testing now, once you actually have the system up, you don't know what the bugs will be," said Amy Fauver, spokeswoman for Cover Oregon, the state agency implementing the law there. In California, which has the nation's largest uninsured population, health officials have begun hinting that they may have a similar problem. "It's a complex system, and there's a lot of navigation that needs to happen," said Oscar Hidalgo, a spokesman for Covered California. He said the agency will know by early September whether the system will be ready in time. If not, he said, customers will still be able to log on to the Web site and peruse insurance plans and view prices. When they get to the final step, however, they will not be able to sign up. They will have to contact a customer service representative to complete the final enrollment step. Officials with the District of Columbia's Health Link decided to put off building a Spanish version of its Web site until later this year, giving its staff bandwidth to complete other tasks they see more critical to the launch. Until then, the District will have bilingual call-center workers and in-person helpers who will be able to help Spanish speakers navigate the site. The hiccups are troubling to advocates, who worry that there will be mistakes that result in people being erroneously rejected by Medicaid or denied subsidies to which they are entitled. They are concerned that impediments will discourage the uninsured from signing up for coverage. "There will be something up and running, but there will be serious, serious difficulties with it" that could result in delays and errors initially, said Robert H. Bonthius Jr., a lawyer at the Legal Aid Society of Cleveland. "It's an extremely ambitious program, well-intentioned, that is going to be very difficult to accomplish, and it's going to be months and maybe years before it really gets sorted out." Much of the difficulty stems