Tested on firmware 3.2.1 and Kindle Keyboard (Wi-Fi). The fonts should work fine on any jailbroken Kindle, but I have only tested them on the Kindle 3 Wi-Fi.
I tried to get the Georgia2 fonts from a previous jailbreak to work but I had all sorts of problems with the Kindle locking up and not being able to enter the settings screen, so I decided to edit the font myself. In the process I edited several other fonts. The archive contains bolder, more legible versions of the following fonts:
|Droid Serif||Serif||View Sample|
|ITC New Baskerville||Serif||View Sample|
|Linux Biolinum||Sans-serif||View Sample|
|Linux Libertine||Serif||View Sample|
|Minion Pro||Serif||View Sample|
|Times New Roman||Serif||View Sample|
Post your questions & comments in the Mobile Read thread.Fonts for Kindle
Before you can use these fonts you must first jailbreak your Kindle. Follow the steps found here to do so.
Then you'll need to install the font hack. Follow the steps found here to do so. There are a bunch of other useful hacks on that page as well, check them out!
Now your Kindle is ready for the fonts.
.ttffiles from the folder of the font you'd like (the files are named:
Serif_Regular.ttf, Serif_Italic.ttf, Serif_Bold.ttf, Serif_BoldItalic.ttf)
K:\is your Kindle)