I have been bypassing Stanza Desktop and using Calibre to send books to my iPhone 3GS.
Formatting, such as bold/italic/underline, links, and chapters all work great, and seem to transfer over without problem (based on the CSS in the ePub).

I'm curious though about typefaces-is the iPhone Stanza just ignoring the typeface callouts and replacing them with the nearest serif or non-serif typeface on the iPhone? It seems as though Georgia is the default, although I may have set that myself a long time ago.

Is there a way to get the iPhone Stanza to use the typefaces specified in the CSS, as long as they are the typefaces available on the iPhone itself? Or is it doing that already, and I'm just not noticing? :p