I have been using .6.24 since it was released and it works well enough for me for the time being... especially since I am in the middle of a book on my Kindle
The best thing is that: 1) I now have the ability to have remote access to all my non Amazon books. 2) I have a central location for my eBooks
It would have been even better if I could have been able to access Dropbox from my Kindle the same way as Stanza on the iPhone.