How can I output a UTF-8 CSV in PHP that Excel will read properly?

I’ve got this very simple thing that just outputs some stuff in CSV format, but it’s got to be UTF-8. I open this file in TextEdit or TextMate or Dreamweaver and it displays UTF-8 characters properly, but if I open it in Excel it’s doing this silly íÄ kind of thing instead. Here’s what I’ve got at the head of my document:

Convert UTF-8 with BOM to UTF-8 with no BOM in Python

Two questions here. I have a set of files which are usually UTF-8 with BOM. I’d like to convert them (ideally in place) to UTF-8 with no BOM. It seems like codecs.StreamRecoder(stream, encode, decode, Reader, Writer, errors) would handle this. But I don’t really see any good examples on usage. Would this be the best way to handle this?