Oh, sure you can change fonts.

Three points:

- You can choose any font that's installed in the system.

- When it's clear how to install fonts into the system (there's no tool at present; shouldn't be a big barrier to doing this), you can use whatever font you really, really want

- You can choose font, italic, bold (that is, either, neither or both), size and hyphenation (on for text, say, and off for headlines) by the "style" -- and style here is used as MS Word uses it, to mean functional roles in the document, including such things as text paragraph, title, section title, subtitle, epigraph, footnote, verse, hyperlink, and so on.

In other words, beyond any other e-book reader, and even beyond what browsers offer.

If you go to the FBReader for Maemo page, there's a link to a page of screenshots of the different options for the program. You can see the Style options at http://only.mawhrin.net/fbreader/maemo/styles-font.png