From their board minutes: "Let's make a Linux OS! No, wait, let's buy BeOS and use that! Great, it works, now let's not ship any products that run it! Now let's announce another Linux OS! Now let's announce an UMPC with a different, incompatible Linux OS than the first one - I mean, second one. Now on shipping day, let's cancel the UMPC and "commit" to the first Linux OS! Let's write an emulator that runs on another company's tablet, and give it away for free - but not ship a product of our own that runs it! And in the meantime, to keep our customers entertained, let's keep selling the Palm name to ourselves over and over again!"
Didn't these guys used to run Atari?
Recapitulating the history of the last 6 years of Palm in 5 lines.