Originally Posted by Zetmolm
Not quite true. On the Bebook Club you can select to open Epubs in FBReader, and then you can select fonts (although for some reason this does not work for all epubs). And it's also very easy to convert epubs for instance to mobi or fb2, formats which are always opened in FBReader and which always allow you to select a font.
On the latest BeBook firmware, which the OP is most likely to have, that option is no longer available.