postgresql on 64-bit windows

It looks like there's no 64-bit version of postgresql for windows:
http://swik.net/PostgreSQL/Planet+Postgresql/Magnus+Hagander:+PostgreSQL
+vs+64-bit+windows

but that the 32-bit version of postgresql works just fine on 32-bit or
64-bit windows, including Vista. Is this correct?

There's a thread here about possibly supporting 64-bit postgresql on
windows:
http://archives.postgresql.org/pgsql-hackers/2008-07/msg00081.php

Are there major issues holding that back or is it just a lack of demand?
Is there still active work going on?

Regards,
    Jeff Davis