Ubuntu OS will come to Smartphones in late 2013 or early 2014. So I checked the related android keywords, and registered these domains: AppsUbuntu.com BestUbuntuPhone.com FreeUbuntuApps.com UbuntuDevelopment.com UbuntuMobile.net UbuntuMobileEdition.com UbuntuPhones.net What do you think, is it bad or?
I think you didn't think... Did you build a business plan about how each would be used an how to monetise before you bought? Atleast you have some time to get them developed and indexed before their release.
If an ubuntu mobile OS is coming, they worth after the particular OS release. However, I am sure they will not worth like Android related domains because it is already popular and that OS also a free OS. But right now, these domains worth just the registration price.