My Kindle Keyboard arrived by USPs yesterday. When I used shift plus space to turn on voice guide, nothing happened. I used the instructions Tim Emmons gave in his podcast. That got the voice guide turned on. My sighted friend came later in the day and setup wi-fi for me. After restarting the Kindle, it updated to the latest firmware. Now shift plus space works.
Using the Kindle users guide, I found I had more navigation options than I expected. I could navigate from page to page by pressing space to stop speech, Press back, use next or previous page and count to the page I want to move to, Press shift plus symbol to start speech. I could navigate by chapter to chapter by pressing space to stop speech, press back, use right or left arrow, press shift plus symbol to start speech. I was happy to see that Kindle speaks the status when moving from chapter to chapter.
I'm happy I made the move to buy a Kindle keyboard.