The modules in question are:
- DateTime::Format::Builder - DateTime::Format::Excel - DateTime::Format::HTTP - DateTime::Format::Mail
I don't know that these modules need much work, as I haven't gotten much in the way of bug reports on them. For the Excel formatter, there is a patch (well, actually they attached the whole .pm file, doh!) sitting in rt.cpan.org to add support for the time portion of a datetime (right now it only support parsing dates).
-dave
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