Whip out the 105mm-long stylus and you can select blocks of copy, or make notes on the pages you are reading and save them for future reference. You can also make handwritten memos, but the thin black lines created when you write on the screen aren't particularly pleasing to the eye and the drawn line can take a moment or two to catch up with what the stylus is doing so memos of more than a few words are best typed using the virtual keyboard.
It's all a bit tablet computing circa 1992, in that regard.
The virtual keyboard also allows readers to search for words in the book they are reading.

Not quite the same as a stroll down Charing Cross Road
The only real niggle we had with the UI was the with the main library view. To scroll up or down you have to use the rather narrow bar on the right of the screen rather than just swipe up and down in any old place.
Format support is a direct carryover from the 505, so the 600 can handle EPub eBook and BBeB Book – with and without DRM – as well as PDF, Word, plain text and RTF files. If you want some music, the 600 can play DRM-free AAC and MP3 files, though Sony still hasn't seen fit to let users view list of audio files in any way other than alphabetically by song title or artist.
If you want to look at still images in greyscale you can do so, with JPEG, GIF, PNG and BMP files all supported.
Sony has also warmed over its eBook Library application, which allows Windows and now also Mac users to view their e-books, transfer content to the Reader and update the gadget's firmware as necessary. It also provides direct links to Waterstones', WH Smith's and Border's e-book stores and an online shop selling Reader accessories.
Regcast training : Hyper-V 3.0, VM high availability and disaster recovery
COMMENTS
I've found a much better alternative
Its an open-source repository of every book published. Its works on simple magstripe technology. It goes several hundred years between charge-ups and best of all is absolutely free.
According to the graphic on the front its made by Spelthorne Borough Council and is badged up as a "Library Card".
Am I the only one who suspects these things are only used by the same people who sit and write their novels on Macs in Starbucks ? To quote Family Guy, "Writing isn't writing unless somone is watching you doing it"
Disappointed... exchanged it
I took my recently-purchased 600 back to Waterstones. I was slightly nervous about this, since waterstones.com has a "We do not offer refunds or exchanges for ereader devices" disclaimer, but I thought I had a reasonable case of "Not fit for purpose." What use is a ereader if reading off it is uncomfortable?
Anyway, the manager of the store was polite and would have given me a refund, but instead I asked for an exchange, and took away for the smaller "Pocket" edition. This doesn't have the touch screen, and the screen quality is day to the 600's night. Brighter "white" level, and only point sources generate disruptive reflections in the pocket's screen, instead of any illuminated object.
Much happier now.

IT infrastructure monitoring strategies
Requirements Checklist for Choosing a Cloud Backup and Recovery Service Provider
Cloud based data management
Enabling efficient data center monitoring
Agentless Backup is Not a Myth