Welcome to MR, Gus!
It's always nice to authors join in our forums. We are an international forum of many devices and appreciate (and like to support) authors who take note of that.
Have you looked into publishing your book on Smashwords? Here is a very helpful page about
How to Publish on Smashwords!
I have the Sony 505, but have friends with Kindles. They like to look for books on Smashwords, although they will usually then go to Amazon and purchase with whispernet.
Here are some links to information about your Kindle that you may find useful..
Links Every Kindle Owner Should Have Plus from the MR Wiki...
Kindle 2 US, Int'l and Kindle DX Font Hack -
Kindle 2 US, Int'l and Kindle DX Screen Saver Hack -
Kindle Myths and Partial Truths -
Amazon Kindle DX and some information about
E-book formats
Have fun in the forums and ask if you have questions.