from the BMW forums ( www.roadfly.com )
Over a terrabyte of bandwidth a month.
We currently have 10 MB connection.
Over 1 Million unique visitors per month.
Over 30 Million Page impressions per month.
Hits are in the 300 Million to 350 Million range.
Servers are all very high end Linux boxes and one
lonely Mac running Mac OS X Server (a real work horse).
Software is all hand written by Alan, myself, David (an intern)
and other interns and is PHP, Perl, MySQL, PostGres, and
some weird custom written scripting stuff.