Palm planning to offer both Windows and Linux handhelds and smartphones?

It's an open secret now that Palm is prepping a Windows Mobile-powered version of the Treo (aka the
Treo 670), but what's been a little less clear is the strength of the company's commitment to the Palm OS. It's not totally inconceivable that Palm could adopt a dual-OS
strategy and offer both Palm and Windows Mobile handhelds and smartphones, and Brighthand reports that there are some encouraging signs that Palm is going to eventually adopt the new
Linux-based version of the Palm OS that PalmSource is developing (and it'd probably have to be the Linux version, since even PalmSource has abandoned development of Cobalt). It's not a lot to go on, but apparently Palm has listings for a bunch of different Linux-related jobs, including a "Linux Engineer, Mobile Devices" who will, "play a key role in the architecture, design and implementation of enabling technologies for a new generation of Palm devices." The big question, then, is when these first Linux-powered Palm devices might start showing up. Seems unlikely it'd be any earlier than the middle of next year or so; PalmSource itself says that the new OS won't be ready until around then.