I used a Handera 330 for reading ebooks for a good two years before I accidently damaged the screen from a fall(left it in my bookbag and the weight of the books crushed it). The new Palm TX and pocket pcs are available that have a similar sized screen to the handera, but with the added bonus of color. So the complaints about no portable ebook reading device is kind of silly considering that the alternative of reading on a palm pilot is not that terrible.
But back to the subject, I do think they should include ebook sales only if some reasonable criteria could be met. Of course even if they refuse to do this, Amazon will eventually start it by a consequence of their marketing tools.