(Also posted to the e-ink notepads thread)
So, I did a comparison annotating pdfs on my Entourage Edge, Asus Eee Note and Nokia N810. I rewrote the same annotations 3 times (math solutions) using the same initial PDF on all 3 devices.
In case anyone is interested, here are the results:
https://www.strongspace.com/rainsber...ercentEDGE.pdf
https://www.strongspace.com/rainsber...entEEEnote.pdf
https://www.strongspace.com/rainsber...tNokiaN810.pdf
Note re: file format - the Asus Eee note only allows you to take snapshots of each page, which are then graphic files. It might look better if I could get the graphic files directly off the device (which I can't without synching or getting a browser not to crash during upload). What I've done is inserted each of these graphics into a page in a Note, which can then be uploaded to evernote, which makes yet another graphic file, and then I can print as a pdf. Both other devices allow exporting as pdf, annotations intact.
Note re: zoom level - only the Nokia allows me to zoom in to annotate, then zoom back out. So, I can make finer annotations because of zoom level. But, the Nokia is also the only touch device (not wacom), so although I can make finer notations, I must do so without otherwise touching the screen.