the US editions are berkeley medium, and it appears that all the UK editions are bembo. (which, as PrinzHilde mentioned, seems to be the overwhelming majority for books printed in the UK).
i have a copy of Bembo which i got in a font pack. it's one of the three different fonts i usually use for school papers. i like it.
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almost always around on the (un)official Ffordian IRC (chat) channel, #tnext on esper.net . one can go here [
www.esper.net] and after it is done loading, type /join #tnext and you should be there!