The Manufacturer is tracked in the
E-book Reader Matrix, but we don't distinguish between ODM (original design manufacturer) and OEM (original equipment manufacturer). There can be issues with the hardware, but usually it is the software (firmware) that counts for an ebook reader. So I would not lump Bookeen or Pocketbook, who use their own reading software, in with the other vendors who use Netronix reading software. This is tracked in the "Misc Info" section of the E-book Reader Matrix.
There are already too many kinds of ebook devices to have forums for all of them. To complicate matters, Astak will be selling devices by Jinke and by Netronix. I am in favour of a Hanlin forum (including Astak EZ Reader) and a Netronix Forum (including Astak Mentor but not Bookeen or Pocketbook). However, there isn't a huge amount of traffic yet for Netronix clones.