Does anyone know how many virtual domains / web sites an apache server can
run?  Most everything i've came across on the web says that as long as you
have the CPU power and enough RAM, that you can keep adding as many
virtual sites as you want, but what does that really mean? 4, 10, 40, 200,
sites?

I understand most of limitations would be based on how heavy the traffic
was, but saying that each site gets very minimal traffic.  Say like if I
give each department of a company their own virtual server address. 
dept.business.com

Just courious, thanks

Thanks