Unless both Sony Ericsson and Motorola bail out of Symbian, and switch purely to Android (more likely for Motorola, less likely for Sony Ericsson), you’ll likely see the same form-factor UIQ devices using Symbian within the next 12 to 18 months.

The nice things about UIQ, as seen on Sony Ericsson phones (for example, taking advantage of a manufacturer’s signature UI, instead of a conformist S60 UI) will likely be adopted by Symbian in the long run anyways.

I also wouldn’t be surprised if the Symbian Foundation doesn’t acquire the remaining assets left outstanding. There really aren’t any buyers that would be interested in Symbian R&D, that don’t already stand to benefit from the Symbian Foundation going open-sourced.