For those of you who want more of a choice which font to use. I haven't tested these fonts with the Cybook as I don't have one yet, but I know that they are of high quality and the Cybook's DPI should be high enough to render them nicely:

URW fonts (ftp://ftp.fu-berlin.de/tex/CTAN/nonfree/support/ghostscript/AFPL/GhostPCL/urwfonts-1.41.tar.bz2) (especially Garamond No8 and URW Palladio [Palatino clone])
Bitstream Vera family (http://ftp.gnome.org/pub/GNOME/sources/ttf-bitstream-vera/1.10/ttf-bitstream-vera-1.10.zip) (also suited for low resolutions)

This is an important issue. I as a book creator need to have an idea what files are typical on a Bookeen. Perhaps mobileread can put together a package zip of free fonts containing a good variety of fonts for general use. It's doubtful that people are going to want to download individual fonts depending on the book.

I'd recommend the liberation fonts http://en.wikipedia.org/wiki/Liberation_fonts

I'd recommend the liberation fonts http://en.wikipedia.org/wiki/Liberation_fonts

They work fine; I'm now using Liberation Sans, which is slightly thinner than the standard Verdana. I find sans serif fonts somewhat easier on the eyes on the Cybook than serif ones, but YMMV.

I did need to delete the font cache (system/font-cache-1 or something close to that) for the new fonts to show up, though. But again, YMMV; installing another font worked fine without doing that.

I just found this:

http://www.smashingmagazine.com/2007/11/08/40-excellent-freefonts-for-professional-design/

Nice find, jbenny! Gentium, Cardo and Day Roman look very usable to me, I still prefer Garamond No8 though.

Here's another nice one (without an italic version though): Vollkorn (http://www.grafikfritze.de/download.php?download=1)
Does the Cybook support OpenType?

And: Linux Libertine (http://sourceforge.net/projects/linuxlibertine)

As soon as I have a Cybook (next month) I'll do some testing with various fonts.

Nice find, jbenny! Gentium, Cardo and Day Roman look very usable to me, I still prefer Garamond No8 though.

Here's another nice one (without an italic version though): Vollkorn (http://www.grafikfritze.de/download.php?download=1)
Does the Cybook support OpenType?

And: Linux Libertine (http://sourceforge.net/projects/linuxlibertine)

As soon as I have a Cybook (next month) I'll do some testing with various fonts.

Some folks here have said that they used TrueType fonts. Someone with a Cybook will have to try OpenType and report back. Again, if the Cybook is going to support epub, they will have to support OpenType.

Some folks here have said that they used TrueType fonts. Someone with a Cybook will have to try OpenType and report back.

OpenType fonts work fine. I have installed a number of them, and they all work.

The DejaVu fonts (http://dejavu.sourceforge.net/wiki/index.php/Main_Page) are based on the Bitstream Vera Fonts, but covers a larger number of languages. Its Unicode coverage is still far from complete though, Wikipedia: Unicode typefaces (http://en.wikipedia.org/wiki/Unicode_typefaces) says that DejaVu has about 5,000 characters compared to about 39,000 in Arial Unicode MS.

A very good alternative to Times: Lido STF (http://www.stormtype.com/free.html) (free for personal use, registration required)
Unfortunately, the line spacing on the Cybook is a bit too narrow for my taste with this font. Maybe this will be adjustable in the future.

EDIT: It is, kind of: How to change the line spacing of a font (http://www.mobileread.com/forums/showthread.php?t=22374)