I just got a Sony PRS-T1 (also a Debian user).
Apart from getting it registered with Adobe (*) it works perfectly with Linux in combination with Calibre for DRM-free ebooks.
I have not yet rooted it but I'm tempted in order to get the new Homescreen.
Cheers,
- Micha.
(*) This may be a non-issue in countries which already support the Sony ebook store, which is not the case in the UK at present.
See this thread for my efforts:
https://www.mobileread.com/forums/sho...d.php?t=159899