The following is official word from Be concerning ftp.be.com (there’s a reason why that isn’t hyperlinked). It is posted here for posterity’s sake.

ftp.be.com is closed indefinitely. Instead, please use one of the mirror sites below:
ftp://be.dsi.unimi.it/pub/Be/
ftp://ftp.chg.ru/pub/BeOS/
ftp://ftp.gbnet.net/pub/be/
ftp://ftp.fsn.hu/pub/beos/
ftp://ftp.kddlabs.co.jp/Be/
ftp://ftp.sunet.se/pub/os/BeOS/
ftp://ftp.sunsite.org.uk/packages/
BeOS_stuff/
ftp://mirror.nucba.ac.jp/mirror/BeOS/

ftp://gd.tuwien.ac.at/opsys/BeOS/
ftp://mirror.aarnet.edu.au/pub/beos/
ftp://mirror.qsi.net.nz/pub/BeOS/

If you have any additions or corrections, please submit a
follow-up tip.