If your running more then 5 computers. Dont use a hub. First of all, they broadcast all traffic causing collisions (boo.). Then, they may say 10mb ports, but in actuality, they dont give you a 10mb on each and every port. some may be 5mb, others 12mb. Seriously, they suck. In a business environment, a switched network is the only way to go...
Don't believe me? Try it...watch the collision light go, and users get mad.
Wilnix