Canonical runs the Ubuntu Certification program, providing users with a verified list of Ubuntu compatible systems. For Manufacturers and partners that would like to understand better the certification program, Canonical publishes a guide available to download from the certification website.
We have recently updated the guide to include a detailed list of the components that will be tested for Oneiric. Each test listed on the guide is required for certification only if the system supports the functionality. For example, we do not run the bluetooth tests on a laptop that does not list bluetooth on its manufacturer specifications.
The list also contains tests that are run for informational proposes. This means that the result of those tests will be shared with the users but they will not determine if the system will pass or fail certification.
As usual, please let me know if you have any questions via launchpad answers.