I don't know what the maintainer (Robert Segall, presumably) of the
Pound website was smoking when he wrote that "don't do virtual
hosting" stuff above, as AFAICT it is nonsense. If you're going to do
virtual hosting based on the HTTP "Host:" header, Pound (or one of its
competitors) appears to be the
ideal place to do that.
Btw, I hear that Pound is excellent, lots of folks here who should
know use and are happy with it. Also, a while back they also fixed
the "HTML streaming" problem pretty quickly after some folks here or
on the AOLserver list (I forget which) raised the issue, which was
very pleasant. The fact that one of it's maintainers appears to have
a few blinders on when it comes to host based virtual hosting
shouldn't do any serious harm...