Doug-
Nothing really on the horizon that could be dubbed a "iPhone killer". I think next up will be the Treo 800w which will run some version of Windows Mobile (hopefully 6.1). The next generation Palm OS isn't scheduled for release until 2009. I think that will be an opportunity for Palm to get back it's much needed swagger.
I see a number of converts over at
EverythingiCafe, after becoming frustrated with "evolutionary" product releases. I sure hope Palm delivers on their promise of releasing a truly revolutionary smartphone in 09'. Afterall, they started the revolution with the Handspring Treo 180.
-Chris