Was searching around hoping for Calibre compatibility with the eBookwise reader. It's too bad to see that its a no go, though I understand the decision- we're talking about a old legacy device after all.
It's too bad though- I like the screen of the eBookwise (like the old Sony CLIE SJ20), I thought it was a good compromise of backlight and battery life and legibility. If I could use Calibre to send books to it, I would definitely pick one up as a budget ereader. Instead, I think just get a Kindle 3 and be done with it...