With palm's recent announcement that it will have a Linux-based Treo by year end and all the hoopla around the upcoming apple OS X palmtop, this seems like a really good time to be in the FOSS world.
I haven't seen the specs of either OS yet, of course. But I can guess at the hardware that they will both debut on, and I'm fairly confident that both devices will be more powerful than the first Linux box I ever worked on. I'm hoping that the end result will be a full enough set of posix libraries to move the LAMP stack with little trouble. "Little trouble" being a relative term, of course.