A version of Ubuntu for smartphones that runs on the Samsung Galaxy Nexus handset is expected to be available for download in late February, Shuttleworth told The Wall Street Journal on Tuesday.
Why that 16-month-old device and not something else was not immediately clear, although the fact that the Galaxy Nexus was distributed as one of Google's unlocked "pure Android" flagship phones may have something to do with it.
There are also plenty of Galaxy Nexus handsets out there. By comparison, its successor, the Nexus 4, has been plagued by supply problems since it launched in November.
In January, Jane Silber of Canonical, the company that produces Ubuntu, explained that Ubuntu for phones would use the same device drivers as Android, which would eventually allow it to run on a wide range of Android devices.
Creating a version of the OS that can be loaded onto existing devices will only be the first step, however. Shuttleworth told the WSJ that Canonical definitely plans to partner with handset makers and carriers to deliver phones with Ubuntu pre-installed, though he declined to mention any names.
He also wouldn't say where Canonical might launch Ubuntu phones, but he did confirm that the company plans to have the devices available in "two large geographic markets" in October.
Chances are, however, that neither North America nor Europe will be among them – at least, not at first. Both of those markets are already heavily saturated with smartphones, with titans Apple and Samsung dominating the field with iOS and Android devices, respectively.
The real opportunity for alternative smartphone platforms lies in providing low-cost devices for the developing world. If Canonical knows what it's doing, it will likely follow the lead of the Mozilla Foundation, which plans to launch its open source Firefox OS mobile platform in Brazil later this year.
India is another booming potential market for smartphones, as is China, though entrenched local vendors could make it difficult to gain a foothold in the People's Republic.