Quest software has been working on a provider to enable the Visual Studio database tools to work with Oracle databases (refactorying, deployment, testing, analysis, etc). They’ve just released a public Beta that you can try out with the VS 2010 Beta 2. Read more about it and download the Beta. You can also check out a video demonstration of the capabilities. In it they cover creating a new Oracle database project, importing your schema, managing and altering objects, comparing your changes to the live schema and deploying them back to the database.
Check it out!