One of the new bells and whistles of MythTV 0.25 is the Setup Wizard. Here you can do video and audio tests, as well as submit your hardware profile.
Why submit your hardware profile? Since a lot of MythTV is supporting many different types of hardware, the MythTV developers need to know where to focus their efforts. They way they do this is by using Smolt, software designed to anonymously collect hardware information. The developers have built this functionality into the new MythTV 0.25 release. Submitting a hardware profile is opt-in and 100% optional, you will lose zero functionality by not submitting a hardware profile and the Mythbuntu and MythTV developers have not enabled this functionality by default.
If you would like to submit your hardware profile, simply click on "Submit your hardware profile" located at Setup > Setup Wizard > Submit your hardware profile. If you change your mind you can opt-out by going to Setup > Setup Wizard > Delete your hardware profile. This will
If you would like to see the data that has been gathered so far from the MythTV community, this page contains the stats from users that have submitted their hardware profile. At the time of this writing Ubuntu (whose MythTV packages are maintained by the Mythbuntu team) makes up over 80% of the responses and holds the top 4 spots in the OS catagory!