The nook was promising for hackers but they
decide to take countermeasures for rooting it in the latest hardware revision. so watch out if you buy a new one.
E_ink is very nice, but the current screens are still on a (hardened) glass substrate (not sure about the kindle 3, but all other are), plastic screens are around the corner, until then really, don't push to hard on that screen.
The main pain is the refresh and the small screen size. I had a sony 505 (was a DOA and no new units where then available) and a pocketbook 302 (which I send back for screen issues - a big production run of e_ink screens could not handle sun light) .
Both where fine units to read a novel or so, but for most technical pdf's you really need more resolution and screen estate .
So, if you are thinking on buying this for "mainly" PDF usage I would really suggest to wait a bit, Pocketbook will come out with a 9" "plastic e-ink" reader and I think they will be a good bet for "hackers" seen they are fairly active in the community on
mobileread.com and seams fairly "open" to hackers , they have also a huge fanbase in russia (it's a Russian firm).
the 9" will however be more $$$, rumours go around the 350 euro pricepoint.
That said I do think i'll get myself a nook (or a kindle), just for reading novels , seen the pricepoint....
Ha, and Dave, the weird opening on the side of a kindle3 can be
used for accessing serial