Oyogi appears to be a question and answer service in the style of Yahoo Answers. The service is fairly sparse right now, and they need to work on getting you involved from the second you hit the site. Yahoo Answers does a great job here by displaying interesting questions on the frontpage, while Wondir has a scrolling display of recent questions and a big white box where you can enter a question right away. Oyogi has neither and it fails to grab your attention. From the site:
Oyogi is a searchable question-and-answer site that allows people to interact with each other in order to solve problems and obtain answers to questions. Oyogi was developed with the belief that there is a lot of information in the world that is not easily obtained through traditional search engines. While the majority of existing search engines attempt to provide access to documents on the web, Oyogi tries to enable people to get help from others in the community, who may be able to assist in answering questions or in solving problems.